Empty files page after upgrade to 23

Nextcloud version (eg, 20.0.5): 23.0.3
Operating system and version (eg, Ubuntu 20.04): Debian buster
Apache or nginx version (eg, Apache 2.4.25): Apache/2.4.38
PHP version (eg, 7.4): 7.4.26

After upgrading my nextcloud installation from 21 to 23, the files page remains empty.
I dont see any errors in nextcloud- or webserver log but loads of errors in the browsers debugging console.

Is this the first time you’ve seen this error? (Y/N): Yes

The output of your Nextcloud log in Admin > Logging:

Log remains empty

The output of your config.php file in /path/to/nextcloud (make sure you remove any identifiable information!):

config/config.php
<?php
$CONFIG = array (
  'debug' => false,
  'memcache.local' => '\\OC\\Memcache\\APCu',
  'mail_smtpmode' => 'smtp',
  'mail_smtphost' => '*****',
  'mail_smtpport' => '587',
  'mail_smtpauth' => true,
  'mail_smtpauthtype' => 'LOGIN',
  'mail_smtpname' => '*****',
  'trashbin_retention_obligation' => 'auto, 30',
  'versions_retention_obligation' => 'auto, 60',
  'mail_smtppassword' => '*****',
  'mail_from_address' => '*****',
  'mail_domain' => '*****',
  'instanceid' => '*****',
  'passwordsalt' => '*****',
  'secret' => '*****',
  'trusted_domains' => 
  array (
    0 => '*****',
    1 => '*****',
  ),
  'dbtype' => 'mysql',
  'version' => '23.0.3.2',
  'overwritehost' => '*****',
  'overwrite.cli.url' => 'https://*****',
  'overwriteprotocol' => 'https',
  'dbname' => '*****',
  'dbhost' => 'localhost',
  'dbport' => '',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => '*****',
  'dbpassword' => '*****',
  'datadirectory' => '/var/www/*****',
  'installed' => true,
  'maintenance' => false,
  'theme' => '',
  'user_backends' => 
  array (
    0 => 
    array (
      'class' => 'OC_User_ISPCONFIG',
      'arguments' => 
      array (
        0 => 'https://*****/remote/index.php',
        1 => 'https://*****/remote/',
        2 => '*****',
        3 => '*****',
        4 => 
        array (
          'allowed_domains' => 
          array (
            0 => '*****',
            1 => '*****',
          ),
          'default_quota' => '100M',
          'default_groups' => 
          array (
          ),
          'domain_config' => 
          array (
            '*****' => 
            array (
              'quota' => '2G',
              'groups' => 
              array (
                0 => 'team',
              ),
              'bare-name' => true,
            ),
          ),
        ),
      ),
    ),
  ),
  'loglevel' => 2,
  'mail_sendmailmode' => 'pipe',
  'mail_smtpsecure' => 'tls',
  'app_install_overwrite' => 
  array (
    0 => 'sharerenamer',
    1 => 'passman',
    2 => 'piwik',
    3 => 'user_ispconfig',
    4 => 'drawio',
    5 => 'files_bpm',
    6 => 'user_saml',
  ),
  'updater.release.channel' => 'stable',
  'default_phone_region' => 'DE',
  'onlyoffice' => 
  array (
    'jwt_secret' => '*****',
  ),
  'twofactor_enforced' => 'true',
  'twofactor_enforced_groups' => 
  array (
    0 => '*****',
    1 => '*****',
    2 => '*****',
  ),
  'twofactor_enforced_excluded_groups' => 
  array (
  ),
  'updater.secret' => '*****',
);

The output of your Apache/nginx/system log in /var/log/____:
https://pastebin.com/QzbXrgrS

Errors in Firefox Browser console

Errors in Browser
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf inline blockiert ("script-src"). moz-extension:2113:49
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src").
Uncaught SyntaxError: expected expression, got end of script
merged-template-prepend.js:306:53
Uncaught SyntaxError: "" literal not terminated before end of script merged-index.js:12525:13
Uncaught SyntaxError: unterminated comment linkeditor.js:10221:29
Uncaught TypeError: OCA.Files.FileList is undefined
    <anonymous> systemtagsfilelist.js:38
    Webpack 5
systemtagsfilelist.js:38:7
Uncaught TypeError: OCA.Files.FileList is undefined
    518 sharedfilelist.js:28
    Webpack 5
sharedfilelist.js:28:5
Uncaught SyntaxError: expected property name, got end of script
activity-sidebar.js:525:4677
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). index.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). index.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). index.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). GetIntrinsic.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). GetIntrinsic.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). GetIntrinsic.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). GetIntrinsic.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). GetIntrinsic.js:21:9
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src"). GetIntrinsic.js:21:9
Uncaught TypeError: OCA.Files.FileList is undefined
    <anonymous> filelist.js:65
    <anonymous> filelist.js:29
    Webpack 5
filelist.js:65:1
Uncaught TypeError: OCA.Files.fileActions is undefined
    registerFileActions mindmap.js:256
    each jQuery
    registerFileActions mindmap.js:255
    init mindmap.js:9
    <anonymous> mindmap.js:664
    jQuery 12
    Webpack 6
mindmap.js:256:4
Content Security Policy: Die Einstellungen der Seite haben das Laden einer Ressource auf eval blockiert ("script-src").
Uncaught SyntaxError: identifier starts immediately after numeric literal
about.js:1:2
Unable to register vcf import action files-action.js:43:9
Uncaught TypeError: OC.MimeType is undefined
    <anonymous> files.js:31
    EventListener.handleEvent* files.js:30
    <anonymous> groupfolders-files.js:2
    <anonymous> groupfolders-files.js:2
files.js:31:5
Please do NOT wait for the DOMContentLoaded before registering your viewer handler Viewer.vue:234
    handlers Viewer.vue:234
    VueJS 11
    value Viewer.js:45
    <anonym> main.js:26
    (Async: EventListener.handleEvent)
    <anonym> main.js:25
    <anonym> files_pdfviewer-main.js:2
    <anonym> files_pdfviewer-main.js:2

List of Apps

occ app:list
Enabled:
  - accessibility: 1.9.0
  - activity: 2.15.0
  - bbb: 2.2.0
  - bruteforcesettings: 2.3.0
  - calendar: 3.2.2
  - circles: 23.1.0
  - cloud_federation_api: 1.6.0
  - comments: 1.13.0
  - contacts: 4.1.0
  - contactsinteraction: 1.4.0
  - dashboard: 7.3.0
  - dav: 1.21.0
  - drawio: 1.0.2
  - event_update_notification: 1.4.0
  - federatedfilesharing: 1.13.0
  - federation: 1.13.0
  - files: 1.18.0
  - files_accesscontrol: 1.13.0
  - files_automatedtagging: 1.13.0
  - files_downloadactivity: 1.12.0
  - files_linkeditor: 1.1.9
  - files_mindmap: 0.0.26
  - files_pdfviewer: 2.4.0
  - files_sharing: 1.15.0
  - files_trashbin: 1.13.0
  - files_versions: 1.16.0
  - files_videoplayer: 1.12.0
  - firstrunwizard: 2.12.0
  - forms: 2.4.0
  - groupfolders: 11.1.2
  - guests: 2.1.0
  - impersonate: 1.10.0
  - logreader: 2.8.0
  - lookup_server_connector: 1.11.0
  - mail: 1.11.7
  - nextcloud_announcements: 1.12.0
  - notes: 4.3.1
  - notifications: 2.11.1
  - oauth2: 1.11.0
  - password_policy: 1.13.0
  - photos: 1.5.0
  - polls: 3.4.2
  - privacy: 1.7.0
  - provisioning_api: 1.13.0
  - quota_warning: 1.13.1
  - ransomware_protection: 1.12.0
  - recommendations: 1.2.0
  - serverinfo: 1.13.0
  - settings: 1.5.0
  - sharebymail: 1.13.0
  - support: 1.6.0
  - survey_client: 1.11.0
  - systemtags: 1.13.0
  - tasks: 0.14.4
  - text: 3.4.1
  - theming: 1.14.0
  - timemanager: 0.2.9
  - twofactor_backupcodes: 1.12.0
  - twofactor_nextcloud_notification: 3.3.1
  - twofactor_totp: 6.2.0
  - twofactor_u2f: 6.3.0
  - updatenotification: 1.13.0
  - user_ispconfig: 0.4.10
  - user_status: 1.3.1
  - viewer: 1.7.0
  - weather_status: 1.3.0
  - workflowengine: 2.5.0
Disabled:
  - admin_audit
  - apporder: 0.14.0
  - bookmarks: 10.2.1
  - cfg_share_links: 1.2.1
  - duplicatefinder: 0.0.13
  - encryption
  - extract: 1.3.3
  - files_bpm: 0.2.1
  - files_external: 1.15.0
  - files_rightclick: 1.2.0
  - onlyoffice: 7.3.2
  - side_menu: 2.3.4
  - spreed: 13.0.4
  - user_ldap
  - user_saml: 4.1.1