getting error message "You can only upload: ."

What does your configuration look like? I'll need more information to be able to assist you.

Here is my config

_config_id: node.type.test
uuid: d0b797fb-8d88-4d1a-8f4b-47a26f109d1c
langcode: en
status: true
dependencies:
  module:
    - menu_ui
    - node_form_overrides
third_party_settings:
  menu_ui:
    available_menus:
      - main
    parent: 'main:'
  node_form_overrides:
    insert_button: Save
    update_button: Update
    insert_title: 'Add new [node:content-type:name]'
    update_title: 'Edit this [node:content-type:name]'
    delete_form_title: 'Are you sure you want to delete this [node:content-type:name]?'
    delete_form_description: 'This action cannot be undone.'
name: Test
type: test
description: ''
help: ''
new_revision: true
preview_mode: 1
display_submitted: true

_config_id: core.entity_form_display.node.test.default
uuid: bab49af5-943a-4742-a90a-f1474a1f5709
langcode: en
status: true
dependencies:
  config:
    - field.field.node.test.field_images2
    - node.type.test
  module:
    - content_moderation
    - extra_field_description
    - file_uploader_uppy
    - hide_revision_field
    - path
    - publication_date
    - text
id: node.test.default
targetEntityType: node
bundle: test
mode: default
content:
  created:
    type: datetime_timestamp
    weight: 10
    region: content
    settings: {  }
    third_party_settings: {  }
  field_images2:
    type: file_uploader_uppy
    weight: 122
    region: content
    settings:
      options:
        instance:
          autoProceed: false
        plugin:
          showProgressDetails: false
          hideCancelButton: false
          hideProgressAfterFinish: false
          singleFileFullScreen: true
          disableStatusBar: false
          disableInformer: false
          disableThumbnailGenerator: false
          waitForThumbnailsBeforeUpload: false
          thumbnailWidth: 200
          enableImageEditor: false
          autoOpenFileEditor: false
          imageEditor:
            actions: {  }
          thumbnailHeight: 200
          theme: light
        uploader:
          method: xhr
      progress_indicator: throbber
    third_party_settings:
      extra_field_description:
        extra_description: ''
  moderation_state:
    type: moderation_state_default
    weight: 100
    region: content
    settings: {  }
    third_party_settings: {  }
  path:
    type: path
    weight: 30
    region: content
    settings: {  }
    third_party_settings: {  }
  promote:
    type: boolean_checkbox
    weight: 15
    region: content
    settings:
      display_label: true
    third_party_settings: {  }
  published_at:
    type: publication_date_timestamp
    weight: 10
    region: content
    settings: {  }
    third_party_settings: {  }
  revision_log:
    type: hide_revision_field_log_widget
    weight: 80
    region: content
    settings:
      rows: 5
      placeholder: ''
      show: true
      default: ''
      permission_based: false
      allow_user_settings: true
      hide_revision: false
    third_party_settings: {  }
  status:
    type: boolean_checkbox
    weight: 120
    region: content
    settings:
      display_label: true
    third_party_settings: {  }
  sticky:
    type: boolean_checkbox
    weight: 16
    region: content
    settings:
      display_label: true
    third_party_settings: {  }
  title:
    type: string_textfield
    weight: -5
    region: content
    settings:
      size: 60
      placeholder: ''
    third_party_settings: {  }
  uid:
    type: entity_reference_autocomplete
    weight: 5
    region: content
    settings:
      match_operator: CONTAINS
      match_limit: 10
      size: 60
      placeholder: ''
    third_party_settings: {  }
  url_redirects:
    weight: 50
    region: content
    settings: {  }
    third_party_settings: {  }
hidden: {  }

_config_id: field.storage.node.field_images2
uuid: e69f741f-fd96-466c-a962-a4d0ce11d38e
langcode: en
status: true
dependencies:
  module:
    - field_permissions
    - file
    - image
    - node
third_party_settings:
  field_permissions:
    permission_type: public
id: node.field_images2
field_name: field_images2
entity_type: node
type: image
settings:
  target_type: file
  display_field: false
  display_default: false
  uri_scheme: public
  default_image:
    uuid: ''
    alt: ''
    title: ''
    width: null
    height: null
module: image
locked: false
cardinality: -1
translatable: true
indexes: {  }
persist_with_no_fields: false
custom_storage: false

_config_id: field.field.node.test.field_images2
uuid: f152d738-0f04-41bb-a823-15e5c0284314
langcode: en
status: true
dependencies:
  config:
    - field.storage.node.field_images2
    - node.type.test
  module:
    - image
id: node.test.field_images2
field_name: field_images2
entity_type: node
bundle: test
label: Images2
description: ''
required: false
translatable: false
default_value: {  }
default_value_callback: ''
settings:
  handler: 'default:file'
  handler_settings: {  }
  file_directory: '[date:custom:Y]-[date:custom:m]'
  file_extensions: 'png gif jpg jpeg webp'
  max_filesize: ''
  max_resolution: ''
  min_resolution: ''
  alt_field: true
  alt_field_required: false
  title_field: true
  title_field_required: false
  default_image:
    uuid: ''
    alt: ''
    title: ''
    width: null
    height: null
field_type: image

Could you also provide the Drupal version, module version, and specify any other file related installed modules.

I got the same error with a fresh drupal 10.3 install on which I only changed the cardinality of the default image field (on the node article) to unlimited.