Cannot access offset of type Drupal\Core\StringTranslation\TranslatableMarkup in isset or empty in Drupal\update\ProjectCoreCompatibility->getPossibleCoreUpdateVersions

Is that Drupal patched, changed, or modified in any way?

No patch, no changed.
Thank you

The value of getPossibleCoreUpdateVersions function parameters:
I don't know if $this->existingCoreVersion value is right.

I hope can help
Thank you

We have a flood of such issues at the moment on d.org issues. Can you please add more info? For example: on which system/distro, server, drupal installation profile, etc. And last but not least: if it is still the case or is it fixed in your case? And when it is fixed, why, how? That would help a lot, because it seems we have a ghost in the shell here with these type of errors atm.

debian 12
docker image
php 8.3
redis

[PHP]

; PHP: engine
engine = On

; PHP: short tag
short_open_tag = On

; PHP: precision of floating point numbers
precision = 14

; PHP: output buffering
output_buffering = 4096

; PHP: transparent output compression using the zlib library
zlib.output_compression = Off

; PHP: implicit flush
implicit_flush = Off

; PHP: unserialize callback function
unserialize_callback_func =

; PHP: serialize precision
serialize_precision = -1

; PHP: disabled functions
disable_functions =

; PHP: disabled class
disable_classes =

; PHP: circular reference collector
zend.enable_gc = On

; PHP: arguments from stack traces generated for exceptions
zend.exception_ignore_args = Off

; PHP: expose the version of php in the header
expose_php = Off

; PHP: max execution time of each script ( in seconds )
max_execution_time = 360

; PHP: max amount of time each script may spend parsing request data ( in seconds )
max_input_time = -1

; PHP: GET/POST/COOKIE input variables accepted
max_input_vars = 3280

; PHP: max amount of memory
memory_limit = 1024M

; PHP: error reporting
error_reporting = E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED

; PHP: display errors
display_errors = Off

; PHP: display startup errors
display_startup_errors = Off

; PHP: log errors
log_errors = On

; PHP: log path
error_log = /enviro/logs/php/php.log

; PHP: max length of errors
log_errors_max_len = 1024

; PHP: log repeated messages
ignore_repeated_errors = Off

; PHP: ignore repeated source code
ignore_repeated_source = Off

; PHP: report memleaks
report_memleaks = On

; PHP: variables order
variables_order = "GPCS"

; PHP: request order
request_order = "GP"

; PHP: registers $argv & $argc each time it runs.
register_argc_argv = Off

; PHP: auto globals jit
auto_globals_jit = On

; PHP: max size of POST data
post_max_size = 1024M

; PHP: automatically add files before PHP document
auto_prepend_file =

; PHP: automatically add files after PHP document
auto_append_file =

; PHP: default mime type
default_mimetype = "text/html"

; PHP: default character set
default_charset = "UTF-8"

; PHP: root folder
doc_root =

; PHP: user folder
user_dir =

; PHP: enable dl() function
enable_dl = Off

; PHP: CGI fix pathinfo
cgi.fix_pathinfo=0

; PHP: file uploads
file_uploads = On

; PHP: file upload max size
upload_max_filesize = 256M

; PHP: max number of files that can be uploaded via a single request
max_file_uploads = 20

; PHP: allow url fopen
allow_url_fopen = On

; PHP: allow url include
allow_url_include = Off

; PHP: default timeout for socket based streams ( in seconds )
default_socket_timeout = 360

; PHP: extension Imagick
extension = imagick.so

; PHP: extension Igbinary
extension = igbinary.so
session.serialize_handler = igbinary
igbinary.compact_strings = On
apc.serializer = igbinary

; PHP: extension Msgpack
extension = msgpack.so

; PHP: extension APCu
extension = apcu.so

; PHP: extension Redis
extension = redis.so

; PHP: extension Memcached
extension = memcached.so

; PHP: extension Uploadprogress
extension = uploadprogress.so

; PHP: extension MaxMindDB
extension = maxminddb.so

; PHP: extension Zend OPcache
zend_extension = opcache.so


[CLI Server]

; CLI Server: CLI web server uses ANSI color coding in its terminal output
cli_server.color = On


[Date]

; Date: timezone used by the date functions
date.timezone = "Europe/Rome"


[Pdo_mysql]

; Pdo_mysql: default socket name for local MySQL connects
pdo_mysql.default_socket=

; Pdo_mysql: add X-PHP-Originating-Script: that will include uid of the script followed by the filename
mail.add_x_header = Off


[ODBC]

; ODBC: allow or prevent persistent links
odbc.allow_persistent = On

; ODBC: check that a connection is still valid before reuse
odbc.check_persistent = On

; ODBC: max number of persistent links
odbc.max_persistent = -1

; ODBC: max number of links ( persistent + non-persistent )
odbc.max_links = -1

; ODBC: handling of LONG fields
odbc.defaultlrl = 4096

; ODBC: Handling of binary data
odbc.defaultbinmode = 1


[MySQLi]

; MySQLi: max number of persistent links
mysqli.max_persistent = -1

; MySQLi: allow or prevent persistent links
mysqli.allow_persistent = On

; MySQLi: max number of links
mysqli.max_links = -1

; MySQLi: default port number for mysqli_connect()
mysqli.default_port = 3306

; MySQLi: default socket name for local MySQL connects
mysqli.default_socket =

; MySQLi: default host for mysqli_connect()
mysqli.default_host =

; MySQLi: default user for mysqli_connect()
mysqli.default_user =

; MySQLi: default password for mysqli_connect()
mysqli.default_pw =

; MySQLi: allow or prevent reconnect
mysqli.reconnect = Off


[mysqlnd]

; Mysqlnd: collect statistics
mysqlnd.collect_statistics = On

; Mysqlnd: collect memory usage statistics
mysqlnd.collect_memory_statistics = On


[PostgreSQL]

; PostgreSQL: persistent links
pgsql.allow_persistent = On

; PostgreSQL: detect broken persistent links always with pg_pconnect()
pgsql.auto_reset_persistent = Off

; PostgreSQL: max number of persistent links
pgsql.max_persistent = -1

; PostgreSQL: max number of links ( persistent + non persistent )
pgsql.max_links = -1

; PostgreSQL: ignore backends notice message
pgsql.ignore_notice = 0

; PostgreSQL: log backends notice message
pgsql.log_notice = 0


[bcmath]

; Bcmath: number of decimal digits for all functions
bcmath.scale = 0


[Session]

; Session: save handler
session.save_handler = files

; Session: save path
session.save_path = "/enviro/tmp"

; Session: strict mode
session.use_strict_mode = 0

; Session: use cookie
session.use_cookies = 1

; Session: use only cookies
session.use_only_cookies = 1

; Session: name
session.name = PHPSESSID

; Session: auto start up
session.auto_start = 0

; Session: lifetime
session.cookie_lifetime = 0

; Session: cookie path
session.cookie_path = /

; Session: cookie domain
session.cookie_domain =

; Session: http only
session.cookie_httponly =

; Session: cookie same site
session.cookie_samesite =

; Session: serialize handler
session.serialize_handler = php

; Session: garbage collection probability
session.gc_probability = 1

; Session: garbage collection divisor
session.gc_divisor = 1000

; Session: garbage collection max lifetime
session.gc_maxlifetime = 1440

; Session: referer check
session.referer_check =

; Session: cache limiter
session.cache_limiter = nocache

; Session: cache expire ( in minutes )
session.cache_expire = 180

; Session: use trans sid
session.use_trans_sid = 0

; Session: sid length
session.sid_length = 26

; Session: trans sid tags
session.trans_sid_tags = "a=href,area=href,frame=src,form="

; Session: sid bits per character
session.sid_bits_per_character = 5


[Assertion]

; Zend: assertions
zend.assertions = 1


[Tidy]

; Tidy: clean output
tidy.clean_output = Off


[soap]

; Soap: cache enabled
soap.wsdl_cache_enabled = 1

; Soap: chache folder
soap.wsdl_cache_dir = "/tmp"

; Soap: chache ttl
soap.wsdl_cache_ttl = 86400

; Soap: chache limit
soap.wsdl_cache_limit = 5


[ldap]

; Ldap: max number of open links
ldap.max_links = -1


[opcache]

; Zend OPCache: enabled
opcache.enable = 0

; Zend OPCache: CLI enabled
opcache.enable_cli = 0

; Zend OPCache: jit buffer size
opcache.jit_buffer_size = 128M

; Zend OPCache: jit
opcache.jit = 1205

; Zend OPCache: revalidate frequency
opcache.revalidate_freq = 0

; Zend OPCache: validate timestamp
opcache.validate_timestamps = 0

; Zend OPCache: max accelerated files
opcache.max_accelerated_files = 10000

; Zend OPCache: shared memory storage size
opcache.memory_consumption = 384

; Zend OPCache: max percentage of "wasted" memory until a restart is scheduled
opcache.max_wasted_percentage = 10

; Zend OPCache: amount of memory for interned strings ( in mbytes )
opcache.interned_strings_buffer = 16

; Zend OPCache: fast shutdown
opcache.fast_shutdown = 1