Problem with displaying shared content in collectives

Dear Nextcloud community,

I have recently encountered a problem with my Nextcloud collectives and am hoping for your help to find a solution.

Specifically, the issue is with the display of shared content in collectives already created by my colleague. When I log into Nextcloud and access my content, I see the document titles, but the content is not displayed (blank page). Often the content, contains images.
(Content created before May 2023 is not affected. These are visible).

We have already tried:

  • Reload page (F5).
  • Transfer the administration rights to another person.
  • Uploaded the data of the collectives again.
  • Tried different browsers.
  • Tried different computers.
  • Performed software update from version 26 to 27.
  • Re-indexed all files.
  • Performed instance self-repair.
  • Removed and reset all Collective shares and made sure all have read and write permissions.

Thank you in advance for your help.

Eror messages:

{“reqId”:“ZRV76jdRu7GZUuvL6G4nZAAAANQ”,“level”:3,“time”:“2023-09-28T13:13:14+00:00”,“remoteAddr”:“109.250.33.4”,“user”:“albert30”,“app”:“no app in context”,“method”:“GET”,“url”:“/remote.php/dav/files/albert30/Collectives/8_Sonstiges%20%26%20Knowledge/8.1%20Knowledge/Windows/Windows%20Lizenzaktivierung/Powershell%20Aktivierung.md”,“message”:“Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.”,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0”,“version”:“27.1.1.0”,“data”:,“id”:“65157beb23ca2”}

{“reqId”:“ZRV76jdRu7GZUuvL6G4nZAAAANQ”,“level”:3,“time”:“2023-09-28T13:13:14+00:00”,“remoteAddr”:“109.250.33.4”,“user”:“albert30”,“app”:“webdav”,“method”:“GET”,“url”:“/remote.php/dav/files/albert30/Collectives/8_Sonstiges%20%26%20Knowledge/8.1%20Knowledge/Windows/Windows%20Lizenzaktivierung/Powershell%20Aktivierung.md”,“message”:“Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.”,“userAgent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0”,“version”:“27.1.1.0”,“exception”:{“Exception”:“OC\Encryption\Exceptions\DecryptionFailedException”,“Message”:“Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.”,“Code”:0,“Trace”:[{“file”:“/var/www/vhosts/REDECTED/lib/private/Files/Stream/Encryption.php”,“line”:517,“function”:“decrypt”,“class”:“OCA\Encryption\Crypto\Encryption”,“type”:“->”,“args”:[“*** sensitive parameters replaced ***”]},{“file”:“/var/www/vhosts/REDECTED/lib/private/Files/Stream/Encryption.php”,“line”:316,“function”:“readCache”,“class”:“OC\Files\Stream\Encryption”,“type”:“->”},{“function”:“stream_read”,“class”:“OC\Files\Stream\Encryption”,“type”:“->”},{“file”:“/var/www/vhosts/REDECTED/apps/files_external/3rdparty/icewind/streams/src/Wrapper.php”,“line”:55,“function”:“fread”},{“file”:“/var/www/vhosts/REDECTED/apps/files_external/3rdparty/icewind/streams/src/CallbackWrapper.php”,“line”:96,“function”:“stream_read”,“class”:“Icewind\Streams\Wrapper”,“type”:“->”},{“function”:“stream_read”,“class”:“Icewind\Streams\CallbackWrapper”,“type”:“->”},{“file”:“/var/www/vhosts/REDECTED/3rdparty/sabre/http/lib/Sapi.php”,“line”:110,“function”:“stream_copy_to_stream”},{“file”:“/var/www/vhosts/REDECTED/3rdparty/sabre/dav/lib/DAV/Server.php”,“line”:490,“function”:“sendResponse”,“class”:“Sabre\HTTP\Sapi”,“type”:“::”},{“file”:“/var/www/vhosts/REDECTED/3rdparty/sabre/dav/lib/DAV/Server.php”,“line”:253,“function”:“invokeMethod”,“class”:“Sabre\DAV\Server”,“type”:“->”},{“file”:“/var/www/vhosts/REDECTED/3rdparty/sabre/dav/lib/DAV/Server.php”,“line”:321,“function”:“start”,“class”:“Sabre\DAV\Server”,“type”:“->”},{“file”:“/var/www/vhosts/REDECTED/apps/dav/lib/Server.php”,“line”:365,“function”:“exec”,“class”:“Sabre\DAV\Server”,“type”:“->”},{“file”:“/var/www/vhosts/REDECTED/apps/dav/appinfo/v2/remote.php”,“line”:35,“function”:“exec”,“class”:“OCA\DAV\Server”,“type”:“->”},{“file”:“/var/www/vhosts/REDECTED/remote.php”,“line”:172,“args”:[“/var/www/vhosts/REDECTED/apps/dav/appinfo/v2/remote.php”],“function”:“require_once”}],“File”:“/var/www/vhosts/REDECTED/apps/encryption/lib/Crypto/Encryption.php”,“Line”:398,“Hint”:“Diese Datei kann nicht entschlüsselt werden, es handelt sich wahrscheinlich um eine geteilte Datei. Bitte kontaktiere den Eigentümer der Datei und bitte darum, die Datei noch einmal mit dir zu teilen.”,“message”:“Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.”,“exception”:,“CustomMessage”:“Cannot decrypt this file, probably this is a shared file. Please ask the file owner to reshare the file with you.”},“id”:“65157beb23c7f”}

It might be a bug.

Has anybody solved this issue?