After update collaboraoffice to code-brand 6.4-22 `richdocuments`stopped working

server:
owncloud 10.8.0.4

after upgrade system installed collaboraoffice6.4 via apt upgrade
from 6.4.10.28-28 to 6.4.10.49-49
i get a bunch of errors in the browser console and the document does not load:

JQMIGRATE: Migrate is installed, version 1.4.0 jquery-migrate.min.js:2:552
Layout was forced before the page was fully loaded. If stylesheets are not yet loaded this may cause a flash of unstyled content. jquery.min.js:4:18306
Deprecation warning: tipsy is deprecated. Use tooltip instead. js.js:2340:10
Content Security Policy: Ignoring ‘x-frame-options’ because of ‘frame-ancestors’ directive.
This page uses the non standard property “zoom”. Consider using calc() in the relevant property values, or using “transform” along with “transform-origin: 0 0”. loleaflet.html:92:41
Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help http://xhr.spec.whatwg.org/ bundle.js:1:766413
Uncaught TypeError: docLayer is undefined
    _handleKeyEvent https://lool.EXAMPLE.de/loleaflet/b8c6e0d/bundle.js:1
    _onKeyDown https://lool.EXAMPLE.de/loleaflet/b8c6e0d/bundle.js:1
    handler https://lool.EXAMPLE.de/loleaflet/b8c6e0d/bundle.js:1
bundle.js:1:1754989
Exception ReferenceError: CanvasSectionContainer is not defined emitting event status: type=text parts=1 current=0 width=12474 height=17406 viewid=6 bundle.js:1:1024561
Exception TypeError: this._painter is undefined emitting event invalidateviewcursor: { "viewId": "0", "part": "0", "rectangle": "1418, 1418, 0, 294" } bundle.js:1:1024561
Exception TypeError: this._painter is undefined emitting event textviewselection: { "viewId": "0", "part": "0", "selection": "" } bundle.js:1:1024561
Exception TypeError: this._painter is undefined emitting event invalidateviewcursor: { "viewId": "5", "part": "0", "rectangle": "1418, 1418, 0, 294" } bundle.js:1:1024561
Exception TypeError: this._painter is undefined emitting event textviewselection: { "viewId": "5", "part": "0", "selection": "" } bundle.js:1:1024561
Exception TypeError: this._painter is undefined emitting event invalidatecursor: { "viewId": "6", "rectangle": "1418, 1418, 0, 294", "mispelledWord": "0", "hyperlink": {} } bundle.js:1:1024561
Exception TypeError: this._textCSelections is undefined emitting event textselection: bundle.js:1:1024561
Exception TypeError: this._painter is undefined emitting event [object ArrayBuffer] bundle.js:1:1024561
Source map error: Error: JSON.parse: unexpected character at line 1 column 1 of the JSON data
Resource URL: https://cloud.EXAMPLE.de/core/vendor/jquery/dist/jquery.min.js?v=793499431122d5d45ce77722e504aba9
Source Map URL: jquery.min.map
Exception TypeError: this._map._docLayer._docPixelSize is undefined emitting event rulerupdate: {
    "margin1": "0",
    "margin2": "17000",
    "leftOffset": "2000",
    "pageOffset": "501",
    "pageWidth": "21001",
    "tabs": [
        {
            "position": "2000",
            "style": "4"
        },
        {
            "position": "4001",
            "style": "4"
        },
        {
            "position": "6001",
            "style": "4"
        },
        {
            "position": "8001",
            "style": "4"
        },
        {
            "position": "10001",
            "style": "4"
        },
        {
            "position": "12002",
            "style": "4"
        },
        {
            "position": "14002",
            "style": "4"
        },
        {
            "position": "16002",
            "style": "4"
        }
    ],
    "unit": " cm"
}
bundle.js:1:1024561
Exception TypeError: this._painter is undefined emitting event [object ArrayBuffer] 2 bundle.js:1:1024561

this was tested in an clean browser profile.
in my normal working profile it is similar - only the loading indicator vanishes and there are some more

11:02:52.615 Uncaught TypeError: this._painter is undefined
    _cssPixelsToTwips https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    _latLngToTwips https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    _onMouseEvent https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    fire https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    _fireDOMEvent https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    _handleDOMEvent https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    handler https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    _on https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    on https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    _mainEvents https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    _initEvents https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    initialize https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    NewClass https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    map https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    <anonymous> https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    <anonymous> https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
    <anonymous> https://lool.potentialeentfalten.de/loleaflet/b8c6e0d/bundle.js:1
bundle.js:1:1477310

errors.

is this a configuration error on my site or a compatibility thing between the 6.4 version and the Collabora Online 2.6.0 app?

any help and tips are welcome.

sunny greetings
stefan


Server configuration

Operating system:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.6 LTS
Release:        18.04
Codename:       bionic

Web server:

$ apache2 -v
Server version: Apache/2.4.29 (Ubuntu)
Server built:   2021-09-28T22:27:27

Database:

PHP version:

$ php -v
PHP 7.4.24 (cli) (built: Sep 23 2021 21:35:51) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
    with Zend OPcache v7.4.24, Copyright (c), by Zend Technologies

ownCloud version: (see ownCloud admin page)

System Status
installed 	1
maintenance 	
needsDbUpgrade 	
version 	10.8.0.4
versionstring 	10.8.0
edition 	Community
productname 	ownCloud
hostname 	h2xxxxxx.stratoserver.net

Updated from an older ownCloud or fresh install:
updated
Where did you install ownCloud from:
official upgrade documentation
Signing status (ownCloud 9.0 and above):

https://cloud.EXAMPLE.de/index.php/settings/integrity/failed
No errors have been found.

The content of config/config.php:

$ occ config:list system
{
    "system": {
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": {
            "0": "localhost",
            "5": "cloud2.potentialeentfalten.de",
            "6": "cloud.potentialeentfalten.de"
        },
        "datadirectory": "\/var\/www\/owncloud\/data",
        "overwrite.cli.url": "http:\/\/localhost",
        "dbtype": "mysql",
        "version": "10.8.0.4",
        "dbname": "owncloud",
        "dbhost": "localhost",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "instanceid": "ocrsgziihrdh",
        "logtimezone": "UTC",
        "web.baseUrl": "https:\/\/cloud.EXAMPLE.de\/index.php\/apps\/web",
        "web.rewriteLinks": false,
        "apps_paths": [
            {
                "path": "\/var\/www\/owncloud\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/owncloud\/apps-external",
                "url": "\/apps-external",
                "writable": true
            }
        ],
        "installed": true,
        "trusted_proxies": [
            "localhost",
            "127.0.0.1"
        ],
        "overwriteprotocol": "https",
        "maintenance": false,
        "mysql.utf8mb4": true,
        "htaccess.RewriteBase": "\/",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_smtpauth": 1,
        "mail_smtpauthtype": "LOGIN",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "465",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "theme": "",
        "loglevel": 0
    }
}

List of activated apps:

$ occ app:list
Enabled:
  - activity:
    - Version: 2.6.1
    - Path: /var/www/owncloud/apps-external/activity
  - calendar:
    - Version: 1.6.4
    - Path: /var/www/owncloud/apps-external/calendar
  - camerarawpreviews:
    - Version: 0.7.11
    - Path: /var/www/owncloud/apps-external/camerarawpreviews
  - comments:
    - Version: 0.3.0
    - Path: /var/www/owncloud/apps/comments
  - configreport:
    - Version: 0.2.0
    - Path: /var/www/owncloud/apps/configreport
  - contacts:
    - Version: 1.5.5
    - Path: /var/www/owncloud/apps-external/contacts
  - dav:
    - Version: 0.6.0
    - Path: /var/www/owncloud/apps/dav
  - federatedfilesharing:
    - Version: 0.5.0
    - Path: /var/www/owncloud/apps/federatedfilesharing
  - federation:
    - Version: 0.1.0
    - Path: /var/www/owncloud/apps/federation
  - files:
    - Version: 1.5.2
    - Path: /var/www/owncloud/apps/files
  - files_external:
    - Version: 0.8.0
    - Path: /var/www/owncloud/apps/files_external
  - files_mediaviewer:
    - Version: 1.0.4
    - Path: /var/www/owncloud/apps/files_mediaviewer
  - files_pdfviewer:
    - Version: 1.0.0
    - Path: /var/www/owncloud/apps-external/files_pdfviewer
  - files_sharing:
    - Version: 0.14.0
    - Path: /var/www/owncloud/apps/files_sharing
  - files_texteditor:
    - Version: 2.3.1
    - Path: /var/www/owncloud/apps-external/files_texteditor
  - files_textviewer:
    - Version: 1.0.3
    - Path: /var/www/owncloud/apps-external/files_textviewer
  - files_trashbin:
    - Version: 0.9.1
    - Path: /var/www/owncloud/apps/files_trashbin
  - files_versions:
    - Version: 1.3.0
    - Path: /var/www/owncloud/apps/files_versions
  - firstrunwizard:
    - Version: 1.2.0
    - Path: /var/www/owncloud/apps/firstrunwizard
  - guests:
    - Version: 0.9.3
    - Path: /var/www/owncloud/apps-external/guests
  - market:
    - Version: 0.6.1
    - Path: /var/www/owncloud/apps/market
  - metadata:
    - Version: 0.10.0
    - Path: /var/www/owncloud/apps-external/metadata
  - music:
    - Version: 1.3.2
    - Path: /var/www/owncloud/apps-external/music
  - notes:
    - Version: 2.0.6
    - Path: /var/www/owncloud/apps-external/notes
  - notifications:
    - Version: 0.5.4
    - Path: /var/www/owncloud/apps/notifications
  - oauth2:
    - Version: 0.5.0
    - Path: /var/www/owncloud/apps-external/oauth2
  - provisioning_api:
    - Version: 0.5.0
    - Path: /var/www/owncloud/apps/provisioning_api
  - richdocuments:
    - Version: 2.6.0
    - Path: /var/www/owncloud/apps-external/richdocuments
  - search_elastic:
    - Version: 1.0.0
    - Path: /var/www/owncloud/apps-external/search_elastic
  - systemtags:
    - Version: 0.3.0
    - Path: /var/www/owncloud/apps/systemtags
  - tasks:
    - Version: 0.9.7
    - Path: /var/www/owncloud/apps-external/tasks
  - templateeditor:
    - Version: 0.4.0
    - Path: /var/www/owncloud/apps-external/templateeditor
  - updatenotification:
    - Version: 0.2.1
    - Path: /var/www/owncloud/apps/updatenotification
  - user_external:
    - Version: 0.6.0
    - Path: /var/www/owncloud/apps/user_external
  - wallpaper:
    - Version: 0.2.2
    - Path: /var/www/owncloud/apps-external/wallpaper
  - web:
    - Version: 4.2.0
    - Path: /var/www/owncloud/apps-external/web
Disabled:
  - customgroups:
    - Path: /var/www/owncloud/apps-external/customgroups
  - encryption:
    - Path: /var/www/owncloud/apps/encryption
  - external:
    - Path: /var/www/owncloud/apps/external
  - systemtags_management:
    - Path: /var/www/owncloud/apps-external/systemtags_management

Are you using external storage, if yes which one: local/smb/sftp/…
no
Are you using encryption: yes/no
no
Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/…
no

Client configuration

Application Basics
Name 	Firefox
Version 	92.0
Build ID 	20210903235534
Distribution ID 	canonical
User Agent 	Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:92.0) Gecko/20100101 Firefox/92.0
OS 	Linux 5.4.0-89-generic #100-Ubuntu SMP Fri Sep 24 14:50:10 UTC 2021
OS Theme 	Breeze-Dark / Adwaita

Logs

Web server error log

empty for the request

ownCloud log (data/owncloud.log)

only the part during me rolading the open collaboara browser tab

{"reqId":"XXXXX","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\Authentication\\Token\\DefaultTokenProvider::updateToken","method":"PROPFIND","url":"\/remote.php\/dav\/files\/Stefan\/","message":"updating token 32560, last check is now 1633684532"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"Testgroups are []"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"Testgroups are []"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"getDiscovery(): Not found in cache; Fetching discovery.xml"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"Storing the discovery.xml under key discovery.xml to the cache."}
{"reqId":"kYxx","level":1,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"getWopiInfoForAuthUser(): Generating WOPI Token for file 239026, version 0."}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"getWopiInfoForAuthUser(): File 239026 is updatable? true"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"generateFileToken(): Issuing token, editor: Stefan, file: 239026, version: 0, owner: Kira, token: EKXX"}
{"reqId":"kYxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/index?fileId=239026&dir=%2Ftest","message":"getWopiInfoForAuthUser(): Issued token: {\"status\":\"success\",\"access_token\":\"EKXX\",\"access_token_ttl\":1633720967000,\"sessionid\":\"0\"}"}
{"reqId":"EGxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/js\/oc.js?v=793499431122d5d45ce77722e504aba9","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"EGxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/js\/oc.js?v=793499431122d5d45ce77722e504aba9","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"EGxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/js\/oc.js?v=793499431122d5d45ce77722e504aba9","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"EGxx","level":0,"time":"2021-10-08T09:22:47+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/js\/oc.js?v=793499431122d5d45ce77722e504aba9","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"JRxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/vendor\/jquery\/dist\/jquery.min.map","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"JRxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/vendor\/jquery\/dist\/jquery.min.map","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"JRxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/vendor\/jquery\/dist\/jquery.min.map","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"JRxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/vendor\/jquery\/dist\/jquery.min.map","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"JRxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/core\/vendor\/jquery\/dist\/jquery.min.map","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"Zlxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/apps\/files\/","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"Zlxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/apps\/files\/","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"Zlxx","level":0,"time":"2021-10-08T09:22:48+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/apps\/files\/","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"5hxx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/ocs\/v2.php\/apps\/notifications\/api\/v1\/notifications?format=json","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"5hxx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\Authentication\\Token\\DefaultTokenProvider::updateTokenActivity","method":"GET","url":"\/ocs\/v2.php\/apps\/notifications\/api\/v1\/notifications?format=json","message":"updating activity of token 32557 to 1633684969"}
{"reqId":"5hxx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/ocs\/v2.php\/apps\/notifications\/api\/v1\/notifications?format=json","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"g1xx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/avatar\/Stefan\/64","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"g1xx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/avatar\/Stefan\/64","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"g1xx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/avatar\/Stefan\/64","message":"token 29XXX with token id 32557 found, validating"}
{"reqId":"yMxx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/ocs\/v2.php\/apps\/notifications\/api\/v1\/notifications?format=json","message":"token d3bXXX with token id 32555 found, validating"}
{"reqId":"yMxx","level":0,"time":"2021-10-08T09:22:49+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"OC\\User\\Session::validateToken","method":"GET","url":"\/ocs\/v2.php\/apps\/notifications\/api\/v1\/notifications?format=json","message":"token d3bXXX with token id 32555 found, validating"}
{"reqId":"Qpxx","level":0,"time":"2021-10-08T09:22:50+00:00","remoteAddr":"127.0.0.1","user":"--","app":"OC\\Authentication\\Token\\DefaultTokenProvider::invalidateToken","method":"GET","url":"\/apps\/richdocuments\/wopi\/files\/239026_ocrsgziihrdh_0_0?access_token=EKXX&access_token_ttl=1633719767000","message":"invalidating token 1dXXX"}
{"reqId":"Qpxx","level":1,"time":"2021-10-08T09:22:50+00:00","remoteAddr":"127.0.0.1","user":"--","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/wopi\/files\/239026_ocrsgziihrdh_0_0?access_token=EKXX&access_token_ttl=1633719767000","message":"wopiCheckFileInfo(): Getting info about file 239026, version 0 by token EKXX."}
{"reqId":"Qpxx","level":0,"time":"2021-10-08T09:22:50+00:00","remoteAddr":"127.0.0.1","user":"--","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/wopi\/files\/239026_ocrsgziihrdh_0_0?access_token=EKXX&access_token_ttl=1633719767000","message":"Loaded WOPI Token record: {\"owner_uid\":\"Kira\",\"editor_uid\":\"Stefan\",\"fileid\":\"239026\",\"version\":\"0\",\"attributes\":\"7\",\"server_host\":\"https:\/\/cloud.EXAMPLE.de\",\"token\":\"EKXX\",\"expiry\":\"1633720967\"}."}
{"reqId":"Qpxx","level":0,"time":"2021-10-08T09:22:50+00:00","remoteAddr":"127.0.0.1","user":"--","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/wopi\/files\/239026_ocrsgziihrdh_0_0?access_token=EKXX&access_token_ttl=1633719767000","message":"wopiPutFile(): Register session as Stefan"}
{"reqId":"Qpxx","level":0,"time":"2021-10-08T09:22:50+00:00","remoteAddr":"127.0.0.1","user":"Stefan","app":"richdocuments","method":"GET","url":"\/apps\/richdocuments\/wopi\/files\/239026_ocrsgziihrdh_0_0?access_token=EKXX&access_token_ttl=1633719767000","message":"wopiCheckFileInfo(): Result: {\"BaseFileName\":\"test.odt\",\"Size\":642,\"Version\":\"0\",\"OwnerId\":\"Kira\",\"UserId\":\"Stefan\",\"UserFriendlyName\":\"Stefan\",\"UserCanWrite\":1,\"UserCanNotWriteRelative\":false,\"PostMessageOrigin\":\"https:\/\/cloud.EXAMPLE.de\",\"LastModifiedTime\":\"2021-10-08T08:21:54.000000Z\"}"}

Browser log

see above

just for the record -
seems i had installed code-brand 6.4-11
and updated to code-brand 6.4-22
i can’t go back as in the official repository only the newest version is available…
https://www.collaboraoffice.com/repos/CollaboraOnline/CODE-ubuntu1804/
:frowning: