ServiceCircularReferenceException: Circular reference detected for service "router.route_provider",

What do you mean by reinstalling the site, technically?

Which contributed modules are present and what are their versions?

Are any patches applied?

> What do you mean by reinstalling the site, technically?

drush si --existing-config

> Which contributed modules are present and what are their versions?
> Are any patches applied?

Yes:

    "require": {
        "php": ">=8.1",
        "composer/installers": "^1.9",
        "cweagans/composer-patches": "^1.7",
        "drupal/admin_theme": "^1.0",
        "drupal/allowed_formats": "^3.0",
        "drupal/core-composer-scaffold": "^10.1",
        "drupal/core-project-message": "^10.1",
        "drupal/core-recommended": "^10.1",
        "drupal/datetimehideseconds": "^1.4",
        "drupal/dialogs": "^1.0",
        "drupal/dropzonejs": "^2.10",
        "drupal/entity_browser": "^2.10",
        "drupal/entity_editor_tabs": "^2",
        "drupal/eva": "^3.0",
        "drupal/field_css": "^2.0@RC",
        "drupal/field_group": "3.x-dev",
        "drupal/flag": "^4.0@beta",
        "drupal/geocoder": "^4.23",
        "drupal/ginvite": "^4",
        "drupal/group_mandatory": "^2.0",
        "drupal/hide_revision_field": "^2.3",
        "drupal/inline_entity_form": "^3.0",
        "drupal/l10n_tools": "^1.0",
        "drupal/label_help": "^2",
        "drupal/layout_builder_tabs": "^1.0",
        "drupal/leaflet": "^10.2",
        "drupal/length_indicator": "^1.2",
        "drupal/livefilter": "1.0.x-dev",
        "drupal/markup": "^2.0@beta",
        "drupal/multilangng": "^1@alpha",
        "drupal/nomarkup": "^1.0",
        "drupal/page_manager": "^4.0@RC",
        "drupal/pathauto": "^1.12",
        "drupal/role_delegation": "^1.2",
        "drupal/simple_pass_reset": "^1.2",
        "drupal/smart_date": "^4.0",
        "drupal/smart_trim": "^2.1",
        "drupal/splide": "^2.0",
        "drupal/symfony_mailer": "^1.4",
        "drupal/user_current_paths": "^2.0",
        "drupal/user_register_notify": "^2.0@beta",
        "drupal/views_linkarea": "^2.0",
        "drupal/workflow_buttons": "^1.0@beta",
        "drush/drush": "^12",
        "geeks4change/geeky-deploy": "^4",
        "geeks4change/webform4json": "^1.0",
        "geocoder-php/google-maps-provider": "^4.7",
        "webflo/drupal-finder": "^1.0.0",
        "wikimedia/composer-merge-plugin": "^2.1"
    },
    "extra": {
        "patches": {
            "drupal/core": {
                "h4d_user / Show user login block in page manager": "https://www.drupal.org/files/issues/unable_to_override_user-2801511-5.patch",
                "h4d_user / Add visibility control conditions to blocks within Layout Builder / 2916876": "https://www.drupal.org/files/issues/2023-12-19/drupal-n2916876-207.patch",
                "2797583 / add content moderation actions, see 2797583#115 how to configure": "https://www.drupal.org/files/issues/2023-12-04/2797583-228.patch"
            },
            "drupal/default_content": {
                "Add a Normalizer and Denormalizer to support Layout Builder - https://www.drupal.org/project/default_content/issues/3160146#comment-14814050": "https://www.drupal.org/files/issues/2022-12-06/default_content-3160146-53.patch",
                "Update inline block usage on import - https://www.drupal.org/project/default_content/issues/3359137#comment-15042582": "https://www.drupal.org/files/issues/2023-05-09/default_content-3359137-3.patch",
                "Predictable order of import, so the frontpage node id remains identical on local/live - https://www.drupal.org/project/default_content/issues/3175870#comment-13853145": "https://www.drupal.org/files/issues/2020-10-08/3175870.patch",
                "Export multi": "https://www.drupal.org/files/issues/2023-10-06/2786479-46.patch",
                "3409088 / Respect content langcode also if site default language is different": "https://git.drupalcode.org/project/default_content/-/merge_requests/37/diffs.patch"
            },
            "drupal/field_group": {
                "HTML5 Validation Prevents Submission in Tabs - https://www.drupal.org/project/field_group/issues/2969051#comment-15022271": "https://www.drupal.org/files/issues/2023-04-24/2969051-99.patch"
            },
            "drupal/entity_reference_revisions": {
                "Views doesn't recognize relationship to host - https://www.drupal.org/project/entity_reference_revisions/issues/2799479#comment-15130190": "https://www.drupal.org/files/issues/2023-06-29/entity_reference_revisions-2799479-fix-only.patch"
            },
            "drupal/persistent_login": {
                "h4d_user / 2899530 / Permission for tab visibility": "https://www.drupal.org/files/issues/2020-01-13/persistent_login-user_task_permission-2899530-15.patch"
            },
            "drupal/eva": {
                "Hide empty eva, e.g. in Team tabs": "https://www.drupal.org/files/issues/2020-09-08/3083993-n11_0.patch"
            },
            "drupal/group": {
                "Duplicate revision tabs": "https://www.drupal.org/files/issues/2023-11-24/group-3397063-12.patch",
                "More contexts needed": "https://www.drupal.org/files/issues/2023-12-13/group-context-2815971-52.patch",
                "Path alias token": "https://www.drupal.org/files/issues/2023-02-17/group-2774827-93.patch"
            }
        },

I agree that exception is very difficult to use on its own because it does not point to the code units that are requiring the services in that chain.

Does drush devel:services produce output?

@cilefen Thanks for looking into this!

I also realized that the WSOD does not display on all pages.

At the moment I have a dev instance online:
https://dev.greenopolis.net/ => WSOD
https://dev.greenopolis.net/de => No WSOD
https://dev.greenopolis.net/de/start => No WSOD
Some (!) images on before mentioned page => WSOD (Images in the green box, e.g. https://dev.greenopolis.net/sites/default/files/styles/h4d_card/public/2...)

> Does drush devel:services produce output? (It would be so nice if we could use details ;)

$ drush @dev devel:services
- Drupal\Component\DependencyInjection\ReverseContainer
- Drupal\Core\Access\CheckProviderInterface
- Drupal\Core\Config\StorageManagerInterface
- Drupal\Core\Database\EventSubscriber\StatementExecutionSubscriber
- Drupal\Core\Entity\HtmlEntityFormController
- Drupal\Core\Form\FormCacheInterface
- Drupal\Core\Http\HandlerStackConfigurator
- Drupal\Core\Menu\MenuTreeStorageInterface
- Drupal\Core\Password\PasswordInterface
- Drupal\Core\Routing\AdminContext
- Drupal\locale\LocaleDefaultConfigStorage
- Drupal\sdc\Component\ComponentValidator
- GuzzleHttp\HandlerStack
- Psr\Http\Message\ResponseFactoryInterface
- Psr\Http\Message\ServerRequestFactoryInterface
- Psr\Http\Message\StreamFactoryInterface
- Psr\Http\Message\UploadedFileFactoryInterface
- Symfony\Component\HttpFoundation\Session\Attribute\AttributeBagInterface
- Symfony\Component\HttpFoundation\Session\Flash\FlashBagInterface
- Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadataFactoryInterface
- Twig\Loader\LoaderInterface
- access_arguments_resolver_factory
- access_check.admin_menu_block_page
- access_check.cron
- access_check.csrf
- access_check.custom
- access_check.db_update
- access_check.default
- access_check.entity
- access_check.entity.layout_builder_access
- access_check.entity_create
- access_check.entity_create_any
- access_check.entity_delete_multiple
- access_check.field_ui.field_reuse
- access_check.field_ui.form_mode
- access_check.field_ui.view_mode
- access_check.flag.action
- access_check.group.installed_content
- access_check.group.member
- access_check.group.owns_content
- access_check.group.permission
- access_check.group_latest_revision
- access_check.group_relationship.create
- access_check.group_relationship.create_any
- access_check.group_relationship.create_any_entity
- access_check.group_relationship.create_entity
- access_check.header.csrf
- access_check.latest_revision
- access_check.node.preview
- access_check.permission
- access_check.role_delegation
- access_check.theme
- access_check.unflag.action
- access_check.update.manager_access
- access_check.user.login_status
- access_check.user.register
- access_check.user.role
- access_checker.entity_revision
- access_manager
- account_switcher
- address.address_format_repository
- address.country_repository
- address.postal_label_formatter
- address.subdivision_repository
- admin_toolbar_search.search_links
- admin_toolbar_tools.helper
- ajax_response.attachments_processor
- ajax_response.subscriber
- anonymous_user_response_subscriber
- asset.css.collection_grouper
- asset.css.collection_optimizer
- asset.css.collection_renderer
- asset.css.dumper
- asset.css.optimizer
- asset.js.collection_grouper
- asset.js.collection_optimizer
- asset.js.collection_renderer
- asset.js.dumper
- asset.js.optimizer
- asset.query_string
- asset.resolver
- authentication
- authentication_collector
- authentication_subscriber
- bare_html_page_renderer
- batch.storage
- blazy.admin
- blazy.admin.extended
- blazy.admin.formatter
- blazy.csp_subscriber
- blazy.entity
- blazy.formatter
- blazy.manager
- blazy.media
- blazy.oembed
- blazy.svg
- block.page_display_variant_subscriber
- block.repository
- block_content.bc_subscriber
- block_content.uuid_lookup
- breadcrumb
- breakpoint.manager
- cache.backend.apcu
- cache.backend.chainedfast
- cache.backend.corefix_memory_no_serialize
- cache.backend.database
- cache.backend.memory
- cache.backend.php
- cache.bootstrap
- cache.config
- cache.data
- cache.default
- cache.discovery
- cache.dynamic_page_cache
- cache.entity
- cache.flexible_permissions
- cache.flexible_permissions_memory
- cache.geocoder
- cache.menu
- cache.page
- cache.render
- cache.static
- cache.toolbar
- cache_context.cookies
- cache_context.headers
- cache_context.ip
- cache_context.languages
- cache_context.layout_builder_is_active
- cache_context.protocol_version
- cache_context.request_format
- cache_context.route
- cache_context.route.group
- cache_context.route.menu_active_trails
- cache_context.route.name
- cache_context.route.name.is_layout_builder_ui
- cache_context.session
- cache_context.session.exists
- cache_context.theme
- cache_context.timezone
- cache_context.url
- cache_context.url.path
- cache_context.url.path.is_front
- cache_context.url.path.parent
- cache_context.url.query_args
- cache_context.url.query_args.pagers
- cache_context.url.site
- cache_context.url.site.scheme__prevent_unsafe_login
- cache_context.user
- cache_context.user.group_permissions
- cache_context.user.is_group_member
- cache_context.user.is_super_user
- cache_context.user.node_grants
- cache_context.user.permissions
- cache_context.user.roles
- cache_contexts_manager
- cache_factory
- cache_router_rebuild_subscriber
- cache_tags.invalidator
- cache_tags.invalidator.checksum
- callable_resolver
- ckeditor5.ckeditor5_cache_tag
- ckeditor5.smart_default_settings
- ckeditor5.stylesheets.message
- class_loader
- class_resolver
- client_error_response_subscriber
- config.config_subscriber
- config.factory
- config.import_transformer
- config.importer_subscriber
- config.installer
- config.manager
- config.storage
- config.storage.export
- config.storage.schema
- config.storage.snapshot
- config.storage.sync
- config.typed
- config_actions
- config_exclude_modules_subscriber
- config_import_subscriber
- config_snapshot_subscriber
- container.namespaces
- content_moderation.config_import_subscriber
- content_moderation.moderation_information
- content_moderation.route_subscriber
- content_moderation.state_transition_validation
- content_moderation.workspace_subscriber
- content_translation.delete_access
- content_translation.manage_access
- content_translation.manager
- content_translation.overview_access
- content_translation.subscriber
- content_translation.synchronizer
- content_type_header_matcher
- content_uninstall_validator
- context.handler
- context.repository
- controller.form
- controller_resolver
- country_manager
- cron
- csrf_token
- ctools.access
- ctools.context_mapper
- ctools.paramconverter.tempstore
- ctools.serializable.tempstore.factory
- ctools.typed_data.resolver
- ctools.wizard.entity.form
- ctools.wizard.factory
- ctools.wizard.form
- ctools.wizard_enhancer
- current_route_match
- current_user
- database
- database.replica
- database.replica_kill_switch
- database_driver_uninstall_validator
- date.formatter
- datetime.time
- default_content.config_subscriber
- default_content.content_entity_normalizer
- default_content.content_file_storage
- default_content.exporter
- default_content.importer
- default_content.inline_block_usage_fixer
- delegatable_roles
- devel.dumper
- devel.error_subscriber
- devel.route_subscriber
- devel.switch_user_list_helper
- devel.theme_rebuild_subscriber
- devel.twig.debug_extension
- dialogs.dialogifyer_factory
- dialogs.hooks
- diff.formatter
- dropzonejs.upload_handler
- dropzonejs.upload_save
- drupal.proxy_original_service.bare_html_page_renderer
- drupal.proxy_original_service.batch.storage
- drupal.proxy_original_service.config.installer
- drupal.proxy_original_service.content_uninstall_validator
- drupal.proxy_original_service.cron
- drupal.proxy_original_service.database_driver_uninstall_validator
- drupal.proxy_original_service.dynamic_page_cache_response_policy
- drupal.proxy_original_service.field.uninstall_validator
- drupal.proxy_original_service.file.mime_type.guesser
- drupal.proxy_original_service.file.mime_type.guesser.extension
- drupal.proxy_original_service.filter.uninstall_validator
- drupal.proxy_original_service.group.uninstall_validator.group_relationship
- drupal.proxy_original_service.language_converter
- drupal.proxy_original_service.lock
- drupal.proxy_original_service.lock.persistent
- drupal.proxy_original_service.menu.active_trail
- drupal.proxy_original_service.module_installer
- drupal.proxy_original_service.module_required_by_themes_uninstall_validator
- drupal.proxy_original_service.node_preview
- drupal.proxy_original_service.page_cache_response_policy
- drupal.proxy_original_service.paramconverter.configentity_admin
- drupal.proxy_original_service.paramconverter.menu_link
- drupal.proxy_original_service.paramconverter.views_ui
- drupal.proxy_original_service.plugin.cache_clearer
- drupal.proxy_original_service.required_module_uninstall_validator
- drupal.proxy_original_service.router.builder
- drupal.proxy_original_service.router.dumper
- dynamic_page_cache_request_policy
- dynamic_page_cache_response_policy
- dynamic_page_cache_subscriber
- early_rendering_controller_wrapper_subscriber
- editor.config_translation_mapper_subscriber
- element.editor
- email.validator
- email_factory
- entity.autocomplete_matcher
- entity.bundle_config_import_validator
- entity.bundle_entity_duplicator
- entity.bundle_plugin.uninstall_validator
- entity.bundle_plugin_installer
- entity.definition_update_manager
- entity.entity_duplicate_subscriber
- entity.form_builder
- entity.last_installed_schema.repository
- entity.memory_cache
- entity.query.config
- entity.query.keyvalue
- entity.query.null
- entity.query.sql
- entity.repository
- entity_browser.route_subscriber
- entity_browser.selection_storage
- entity_bundle.listener
- entity_display.repository
- entity_editor_tabs.utility
- entity_field.deleted_fields_repository
- entity_field.manager
- entity_reference_revisions.orphan_purger
- entity_route_context.entity_route_context
- entity_route_context.route_helper
- entity_route_subscriber
- entity_type.bundle.info
- entity_type.listener
- entity_type.manager
- entity_type.repository
- errorlevelpermission.config_override
- eva.token_handler
- eva.view_displays
- event_dispatcher
- exception.custom_page_html
- exception.default_html
- exception.default_json
- exception.enforced_form_response
- exception.fast_404_html
- exception.final
- exception.logger
- exception.needs_installer
- extension.list.database_driver
- extension.list.module
- extension.list.profile
- extension.list.theme
- extension.list.theme_engine
- extension.path.resolver
- field.uninstall_validator
- field_css_block_component_render_array_subscriber
- field_definition.listener
- field_group.param_converter
- field_group.subscriber
- field_storage_definition.listener
- field_ui.subscriber
- file.event.subscriber
- file.htaccess_writer
- file.mime_type.guesser
- file.mime_type.guesser.extension
- file.recursive_validator
- file.recursive_validator_factory
- file.repository
- file.upload_handler
- file.usage
- file.validator
- file_system
- file_url_generator
- filter.uninstall_validator
- finish_response_subscriber
- flag
- flag.count
- flag.link_builder
- flag.twig.count
- flexible_permissions.chain_calculator
- flexible_permissions.checker
- flood
- form_ajax_response_builder
- form_ajax_subscriber
- form_builder
- form_error_handler
- form_submitter
- form_validator
- geocoder
- geocoder.http_adapter
- geocoder.throttle
- geocoder_address.address
- geocoder_field.plugin.manager.field
- geofield.geophp
- geofield.wkt_generator
- gnode.route_subscriber
- group.admin_path.route_subscriber
- group.anonymous_user_response_subscriber
- group.config_subscriber
- group.group_route_context
- group.latest_revision.route_subscriber
- group.membership_loader
- group.permissions
- group.relation_handler.access_control
- group.relation_handler.access_control.group_membership
- group.relation_handler.access_control.group_node
- group.relation_handler.entity_reference
- group.relation_handler.entity_reference.group_membership
- group.relation_handler.entity_reference.group_node
- group.relation_handler.operation_provider
- group.relation_handler.operation_provider.group_membership
- group.relation_handler.operation_provider.group_node
- group.relation_handler.permission_provider
- group.relation_handler.permission_provider.group_membership
- group.relation_handler.permission_provider.group_node
- group.relation_handler.post_install
- group.relation_handler.post_install.group_membership
- group.relation_handler.post_install.group_node
- group.relation_handler.ui_text_provider
- group.relation_handler.ui_text_provider.group_membership
- group.relation_handler.ui_text_provider.group_node
- group.revision.route_subscriber
- group.uninstall_validator.group_relationship
- group_mandatory.entity_form_controller_override
- group_permission.calculator
- group_permission.checker
- group_permission.hash_generator
- group_permission.individual_calculator
- group_permission.synchronized_calculator
- group_relation_type.manager
- group_relationship_type.breadcrumb
- help_twig.extension
- html_response.attachments_processor
- html_response.placeholder_strategy_subscriber
- html_response.subscriber
- http_client
- http_client_factory
- http_kernel
- http_kernel.basic
- http_kernel.controller.argument_resolver
- http_middleware.ajax_page_state
- http_middleware.content_length
- http_middleware.kernel_pre_handle
- http_middleware.negotiation
- http_middleware.page_cache
- http_middleware.reverse_proxy
- http_middleware.session
- image.factory
- image.toolkit.manager
- image.toolkit.operation.manager
- info_parser
- inline_block.usage
- json_field.requirements
- json_field.views
- kernel
- kernel_destruct_subscriber
- keyvalue
- keyvalue.database
- keyvalue.expirable
- keyvalue.expirable.database
- l10n_tools.query_helper
- language.config_factory_override
- language.config_subscriber
- language.current_language_context
- language.default
- language_converter
- language_manager
- language_negotiator
- language_request_subscriber
- layout.icon_builder
- layout_builder.component_visibility_subscriber
- layout_builder.element.prepare_layout
- layout_builder.get_block_dependency_subscriber
- layout_builder.param_converter
- layout_builder.render_block_component_subscriber
- layout_builder.routes
- layout_builder.sample_entity_generator
- layout_builder.tempstore.route_enhancer
- layout_builder.tempstore_repository
- layout_builder_modal.ajax_response_subscriber
- layout_builder_tabs.customTwigExtension
- leaflet.service
- length_indicator.get_width_pos
- library.dependency_resolver
- library.discovery
- library.discovery.collector
- library.discovery.parser
- library.libraries_directory_file_finder
- link_generator
- linkit.suggestion_manager
- locale.config_manager
- locale.config_subscriber
- locale.locale_translation_cache_tag
- locale.plural.formula
- locale.project
- locale.storage
- lock
- lock.persistent
- logger.channel.ckeditor5
- logger.channel.cron
- logger.channel.default
- logger.channel.file
- logger.channel.form
- logger.channel.geofield
- logger.channel.image
- logger.channel.layout_builder
- logger.channel.mail
- logger.channel.menu
- logger.channel.php
- logger.channel.router
- logger.channel.security
- logger.channel.social_media_links
- logger.channel.system
- logger.channel.update
- logger.channel.user
- logger.channel.webform
- logger.channel.webform_submission
- logger.dblog
- logger.drupaltodrush
- logger.factory
- logger.log_message_parser
- logger.syslog
- login_destination.manager
- login_destination.toolbar_link_builder
- login_emailusername.route_subscriber
- main_content_renderer.ajax
- main_content_renderer.dialog
- main_content_renderer.html
- main_content_renderer.modal
- main_content_renderer.off_canvas
- main_content_renderer.off_canvas_top
- main_content_view_subscriber
- maintenance_mode
- maintenance_mode_subscriber
- media.config_subscriber
- media.oembed.iframe_url_helper
- media.oembed.provider_repository
- media.oembed.resource_fetcher
- media.oembed.url_resolver
- media_library.opener.editor
- media_library.opener.field_widget
- media_library.opener_resolver
- media_library.route_subscriber
- media_library.ui_builder
- menu.active_trail
- menu.default_tree_manipulators
- menu.link_tree
- menu.parent_form_selector
- menu.rebuild_subscriber
- menu_link.static.overrides
- messenger
- method_filter
- module_handler
- module_installer
- module_required_by_themes_uninstall_validator
- multilangng_source_language.translation_service_factory
- multilangng_translations.config_override
- multilangng_translations.config_translations_filter
- multilangng_translations.config_translations_override_provider
- node.admin_path.route_subscriber
- node.grant_storage
- node.node_route_context
- node.node_translation_exception
- node.route_subscriber
- node_preview
- options_request_listener
- page_cache_kill_switch
- page_cache_request_policy
- page_cache_response_policy
- page_manager.context_mapper
- page_manager.current_user_context
- page_manager.language_interface_context
- page_manager.page_access_check
- page_manager.page_manager_routes
- page_manager.route_name_response_subscriber
- page_manager.route_param_context
- page_manager.variant_route_filter
- pager.manager
- pager.parameters
- paragraphs_type.uuid_lookup
- paramconverter.configentity_admin
- paramconverter.entity
- paramconverter.entity_revision
- paramconverter.menu_link
- paramconverter.views_ui
- paramconverter_manager
- paramconverter_subscriber
- password_generator
- path.current
- path.matcher
- path.validator
- path_alias.manager
- path_alias.path_processor
- path_alias.repository
- path_alias.subscriber
- path_alias.whitelist
- path_processor.files
- path_processor.image_styles
- path_processor_decode
- path_processor_front
- path_processor_language
- path_processor_manager
- pathauto.alias_cleaner
- pathauto.alias_storage_helper
- pathauto.alias_uniquifier
- pathauto.generator
- pathauto.settings_cache_tag
- pathauto.verbose_messenger
- permission_checker
- permission_generator.role_delegation
- pgsql.entity.query.sql
- placeholder_strategy
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- plugin.manager.webform.variant
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More error details with backtrace:

User	Anonymous (not verified)
Location	https://dev.greenopolis.net/sites/default/files/styles/h4d_card/public/2024-03/2022_04_09_allmende_Gruppenbild-Schlageten-scaled_0_1_4_5_6_0_0_13_1.jpg?itok=ScVKnsZP
Referrer	
Message	Symfony\Component\DependencyInjection\Exception\ServiceCircularReferenceException: Circular reference detected for service "router.route_provider", path: "options_request_listener -> router.route_provider -> cache_tags.invalidator -> plugin.manager.block -> logger.channel.default -> logger.factory -> logger.syslog -> router -> router.no_access_checks". in Drupal\Component\DependencyInjection\Container->get() (line 147 of /srv/www/freistilbox/clients/c11000/s3255/.deploy/releases/2df692fb5b71ccebfff7de6130ee37edfa3df207/web/core/lib/Drupal/Component/DependencyInjection/Container.php).

#0 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#1 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(237): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#2 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#3 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#4 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(237): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#5 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#6 /web/core/modules/user/src/Plugin/LanguageNegotiation/LanguageNegotiationUserAdmin.php(91): Drupal\Component\DependencyInjection\Container->get()
#7 /web/core/lib/Drupal/Core/Plugin/Factory/ContainerFactory.php(21): Drupal\user\Plugin\LanguageNegotiation\LanguageNegotiationUserAdmin::create()
#8 /web/core/lib/Drupal/Component/Plugin/PluginManagerBase.php(83): Drupal\Core\Plugin\Factory\ContainerFactory->createInstance()
#9 /web/core/modules/language/src/LanguageNegotiator.php(221): Drupal\Component\Plugin\PluginManagerBase->createInstance()
#10 /web/core/modules/language/src/LanguageNegotiator.php(197): Drupal\language\LanguageNegotiator->getNegotiationMethodInstance()
#11 /web/core/modules/language/src/LanguageNegotiator.php(137): Drupal\language\LanguageNegotiator->negotiateLanguage()
#12 /web/core/modules/language/src/ConfigurableLanguageManager.php(218): Drupal\language\LanguageNegotiator->initializeType()
#13 /web/modules/contrib/multilangng/multilangng_translations/src/ConfigOverride/MultiLangNGTranslationsConfigOverride.php(85): Drupal\language\ConfigurableLanguageManager->getCurrentLanguage()
#14 /web/modules/contrib/multilangng/multilangng_translations/src/ConfigOverride/MultiLangNGTranslationsConfigOverride.php(131): Drupal\multilangng_translations\ConfigOverride\MultiLangNGTranslationsConfigOverride->getTargetLanguage()
#15 /web/core/lib/Drupal/Core/Config/ConfigFactory.php(275): Drupal\multilangng_translations\ConfigOverride\MultiLangNGTranslationsConfigOverride->getCacheSuffix()
#16 /web/core/lib/Drupal/Core/Config/ConfigFactory.php(294): Drupal\Core\Config\ConfigFactory->getCacheKeys()
#17 /web/core/lib/Drupal/Core/Config/ConfigFactory.php(154): Drupal\Core\Config\ConfigFactory->getConfigCacheKey()
#18 /web/core/lib/Drupal/Core/Config/ConfigFactory.php(104): Drupal\Core\Config\ConfigFactory->doLoadMultiple()
#19 /web/core/lib/Drupal/Core/Config/ConfigFactory.php(89): Drupal\Core\Config\ConfigFactory->doGet()
#20 /web/core/modules/syslog/src/Logger/SysLog.php(48): Drupal\Core\Config\ConfigFactory->get()
#21 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(259): Drupal\syslog\Logger\SysLog->__construct()
#22 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#23 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#24 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(273): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#25 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#26 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#27 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(249): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#28 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#29 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#30 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(237): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#31 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#32 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#33 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(237): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#34 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(455): Drupal\Component\DependencyInjection\Container->createService()
#35 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(273): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#36 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#37 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#38 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(237): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#39 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#40 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(440): Drupal\Component\DependencyInjection\Container->get()
#41 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(237): Drupal\Component\DependencyInjection\Container->resolveServicesAndParameters()
#42 /web/core/lib/Drupal/Component/DependencyInjection/Container.php(177): Drupal\Component\DependencyInjection\Container->createService()
#43 /web/core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php(105): Drupal\Component\DependencyInjection\Container->get()
#44 /vendor/symfony/http-kernel/HttpKernel.php(157): Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch()
#45 /vendor/symfony/http-kernel/HttpKernel.php(76): Symfony\Component\HttpKernel\HttpKernel->handleRaw()
#46 /web/core/lib/Drupal/Core/StackMiddleware/Session.php(58): Symfony\Component\HttpKernel\HttpKernel->handle()
#47 /web/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(48): Drupal\Core\StackMiddleware\Session->handle()
#48 /web/core/lib/Drupal/Core/StackMiddleware/ContentLength.php(28): Drupal\Core\StackMiddleware\KernelPreHandle->handle()
#49 /web/core/modules/page_cache/src/StackMiddleware/PageCache.php(191): Drupal\Core\StackMiddleware\ContentLength->handle()
#50 /web/core/modules/page_cache/src/StackMiddleware/PageCache.php(128): Drupal\page_cache\StackMiddleware\PageCache->fetch()
#51 /web/core/modules/page_cache/src/StackMiddleware/PageCache.php(82): Drupal\page_cache\StackMiddleware\PageCache->lookup()
#52 /web/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(48): Drupal\page_cache\StackMiddleware\PageCache->handle()
#53 /web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(51): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle()
#54 /web/core/lib/Drupal/Core/StackMiddleware/AjaxPageState.php(36): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#55 /web/core/lib/Drupal/Core/StackMiddleware/StackedHttpKernel.php(51): Drupal\Core\StackMiddleware\AjaxPageState->handle()
#56 /web/core/lib/Drupal/Core/DrupalKernel.php(704): Drupal\Core\StackMiddleware\StackedHttpKernel->handle()
#57 /web/index.php(19): Drupal\Core\DrupalKernel->handle()

Does this occur only with the multilangng module?

Indeed! If I turn of either multilangng OR syslog, the errors disappear!