Cannot upload pictures into group chats after 33.0.3 update

When trying to upload picture to a group chat i can see only a spinning wheel, works fine with 1:1 chat.

Users sync via LDAP

Enabled:
  - activity: 6.0.0
  - admin_audit: 1.23.0
  - announcementcenter: 7.3.0
  - bruteforcesettings: 6.0.0
  - calendar: 6.2.4
  - calendar_resource_management: 0.11.0
  - circles: 33.0.0
  - cloud_federation_api: 1.17.0
  - collectives: 4.3.0
  - comments: 1.23.0
  - contacts: 8.4.5
  - contactsinteraction: 1.14.1
  - dashboard: 7.13.0
  - dav: 1.36.0
  - deck: 1.17.1
  - event_update_notification: 2.8.0
  - external: 8.0.1
  - federatedfilesharing: 1.23.0
  - files: 2.5.0
  - files_accesscontrol: 4.0.0
  - files_automatedtagging: 4.0.0
  - files_external: 1.25.1
  - files_fulltextsearch: 33.0.0
  - files_pdfviewer: 6.0.0
  - files_reminders: 1.6.0
  - files_sharing: 1.25.2
  - files_trashbin: 1.23.0
  - files_versions: 1.26.0
  - fileslibreofficeedit: 2.0.1
  - firstrunwizard: 6.0.0
  - forms: 5.2.7
  - fulltextsearch: 33.0.0
  - fulltextsearch_elasticsearch: 33.0.0
  - groupfolders: 21.0.7
  - impersonate: 4.0.0
  - integration_giphy: 2.2.1
  - intravox: 1.3.0
  - intros: 1.2.1
  - logreader: 6.0.0
  - lookup_server_connector: 1.21.0
  - mail: 5.7.14
  - metavox: 2.0.8
  - nextcloud-aio: 0.8.0
  - nextcloud_announcements: 5.0.0
  - notes: 5.0.0
  - notifications: 6.0.0
  - notify_push: 1.3.1
  - oauth2: 1.21.0
  - oidc: 1.16.5
  - password_policy: 5.0.0
  - passwords: 2026.5.10
  - photos: 6.0.0
  - polls: 9.0.7
  - previewgenerator: 5.13.0
  - privacy: 5.0.0
  - profile: 1.2.0
  - provisioning_api: 1.23.0
  - quota_warning: 1.23.0
  - recommendations: 6.0.0
  - related_resources: 4.0.0
  - richdocuments: 10.1.3
  - serverinfo: 5.0.0
  - settings: 1.16.0
  - sharebymail: 1.23.0
  - sketch_picker: 2.4.0
  - spreed: 23.0.4
  - support: 5.0.0
  - survey_client: 5.0.0
  - suspicious_login: 11.0.0
  - systemtags: 1.23.0
  - tables: 2.1.0
  - tasks: 0.17.1
  - text: 7.0.1
  - text_templates: 1.4.0
  - theming: 2.8.0
  - twofactor_backupcodes: 1.22.0
  - twofactor_nextcloud_notification: 7.0.0
  - twofactor_totp: 15.0.0
  - updatenotification: 1.23.0
  - user_ldap: 1.24.0
  - user_status: 1.13.0
  - user_usage_report: 4.0.0
  - users_picker: 1.2.2
  - viewer: 6.0.0
  - weather_status: 1.13.0
  - webhook_listeners: 1.5.0
  - welcome: 2.0.0
  - whiteboard: 1.5.7
  - workflowengine: 2.15.0
Disabled:
  - app_api: 33.0.0 (installed 32.0.0)
  - auto_groups: 1.7.0 (installed 1.7.0)
  - encryption: 2.21.0
  - federation: 1.23.0 (installed 1.16.0)
  - files_downloadactivity: 1.18.1 (installed 1.18.1)
  - files_downloadlimit: 5.1.0 (installed 1.0.1)
  - integration_zammad: 4.0.1 (installed 4.0.1)
  - metadata: 0.23.0 (installed 0.23.0)
  - testing: 1.23.0

Logs attached below

Nextcloud version (eg, 24.0.1): 33.0.3 AIO 13.0.1

The output of your Nextcloud log in Admin > Logging or errors in nextcloud.log in /var/www/:

NoUserException
Backends provided no user object
Error while sending ' . share created . ' event

[no app in context] Error: Error while sending ' . share created . ' event
	POST /ocs/v2.php/apps/files_sharing/api/v1/shares
	from 192.168.15.5 by 908157B5-4844-45BA-A3E1-F2CEBC5BC122 at 5 maj 2026, 06:55:46
{"reqId":"4XXblsazcI3fufsGHwg5","level":3,"time":"2026-05-05T04:55:46+00:00","remoteAddr":"192.168.15.5","user":"908157B5-4844-45BA-A3E1-F2CEBC5BC122","app":"no app in context","method":"POST","url":"/ocs/v2.php/apps/files_sharing/api/v1/shares","scriptName":"/ocs/v2.php","message":"Error while sending ' . share created . ' event","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/147.0.0.0","version":"33.0.3.2","exception":{"Exception":"OC\\User\\NoUserException","Message":"Backends provided no user object","Code":0,"Trace":[{"function":"getUserFolder","class":"OC\\Files\\Node\\Root","type":"->","args":["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]},{"file":"/var/www/html/lib/private/Files/Node/LazyFolder.php","line":66,"function":"call_user_func_array","args":[[{"__class__":"OC\\Files\\Node\\Root"},"getUserFolder"],["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]]},{"file":"/var/www/html/lib/private/Files/Node/LazyRoot.php","line":38,"function":"__call","class":"OC\\Files\\Node\\LazyFolder","type":"->","args":["getUserFolder",["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]]},{"file":"/var/www/html/apps/files_sharing/lib/ShareTargetValidator.php","line":70,"function":"getUserFolder","class":"OC\\Files\\Node\\LazyRoot","type":"->","args":["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]},{"file":"/var/www/html/apps/files_sharing/lib/ShareRecipientUpdater.php","line":77,"function":"verifyMountPoint","class":"OCA\\Files_Sharing\\ShareTargetValidator","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***",{"__class__":"Closure"},["*** sensitive parameters replaced ***"]]},{"file":"/var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php","line":101,"function":"updateForAddedShare","class":"OCA\\Files_Sharing\\ShareRecipientUpdater","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php","line":139,"function":"OCA\\Files_Sharing\\Listener\\{closure}","class":"OCA\\Files_Sharing\\Listener\\SharesUpdatedListener","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php","line":99,"function":"markOrRun","class":"OCA\\Files_Sharing\\Listener\\SharesUpdatedListener","type":"->","args":["*** sensitive parameters replaced ***",{"__class__":"Closure"}]},{"file":"/var/www/html/lib/private/EventDispatcher/ServiceEventListener.php","line":57,"function":"handle","class":"OCA\\Files_Sharing\\Listener\\SharesUpdatedListener","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":220,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"},"OCP\\Share\\Events\\ShareCreatedEvent",{"__class__":"Symfony\\Component\\EventDispatcher\\EventDispatcher"}]},{"file":"/var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":56,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->","args":[[{"__class__":"Closure"},{"__class__":"Closure"},{"__class__":"Closure"},{"__class__":"Closure"},{"__class__":"Closure"},"And 9 more entries, set log level to debug to see all entries"],"OCP\\Share\\Events\\ShareCreatedEvent",{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/lib/private/EventDispatcher/EventDispatcher.php","line":67,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"},"OCP\\Share\\Events\\ShareCreatedEvent"]},{"file":"/var/www/html/lib/private/EventDispatcher/EventDispatcher.php","line":79,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->","args":["OCP\\Share\\Events\\ShareCreatedEvent",{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/lib/private/Share20/Manager.php","line":1973,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/lib/private/Share20/Manager.php","line":730,"function":"dispatchEvent","class":"OC\\Share20\\Manager","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"},"share created"]},{"file":"/var/www/html/apps/files_sharing/lib/Controller/ShareAPIController.php","line":830,"function":"createShare","class":"OC\\Share20\\Manager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":205,"function":"createShare","class":"OCA\\Files_Sharing\\Controller\\ShareAPIController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Files_Sharing\\Controller\\ShareAPIController"},"createShare"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Files_Sharing\\Controller\\ShareAPIController"},"createShare"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Files_Sharing\\Controller\\ShareAPIController","createShare",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"_route":"ocs.files_sharing.shareapi.createshare"}]},{"file":"/var/www/html/ocs/v1.php","line":61,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/ocsapp/apps/files_sharing/api/v1/shares"]},{"file":"/var/www/html/ocs/v2.php","line":8,"args":["/var/www/html/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/html/lib/private/Files/Node/Root.php","Line":331,"message":"Error while sending ' . share created . ' event","exception":"{\"class\":\"OC\\User\\NoUserException\",\"message\":\"Backends provided no user object\",\"code\":0,\"file\":\"/var/www/html/lib/private/Files/Node/Root.php:331\",\"trace\":\"#0 [internal function]: OC\\Files\\Node\\Root->getUserFolder('7D5F1FF2-1119-4...')\\n#1 /var/www/html/lib/private/Files/Node/LazyFolder.php(66): call_user_func_array(Array, Array)\\n#2 /var/www/html/lib/private/Files/Node/LazyRoot.php(38): OC\\Files\\Node\\LazyFolder->__call('getUserFolder', Array)\\n#3 /var/www/html/apps/files_sharing/lib/ShareTargetValidator.php(70): OC\\Files\\Node\\LazyRoot->getUserFolder('7D5F1FF2-1119-4...')\\n#4 /var/www/html/apps/files_sharing/lib/ShareRecipientUpdater.php(77): OCA\\Files_Sharing\\ShareTargetValidator->verifyMountPoint(Object(OC\\User\\LazyUser), Object(OC\\Share20\\Share), Object(Closure), Array)\\n#5 /var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php(101): OCA\\Files_Sharing\\ShareRecipientUpdater->updateForAddedShare(Object(OC\\User\\LazyUser), Object(OC\\Share20\\Share))\\n#6 /var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php(139): OCA\\Files_Sharing\\Listener\\SharesUpdatedListener->OCA\\Files_Sharing\\Listener\\{closure}()\\n#7 /var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php(99): OCA\\Files_Sharing\\Listener\\SharesUpdatedListener->markOrRun(Object(OC\\User\\LazyUser), Object(Closure))\\n#8 /var/www/html/lib/private/EventDispatcher/ServiceEventListener.php(57): OCA\\Files_Sharing\\Listener\\SharesUpdatedListener->handle(Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#9 /var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php(220): OC\\EventDispatcher\\ServiceEventListener->__invoke(Object(OCP\\Share\\Events\\ShareCreatedEvent), 'OCP\\\\Share\\\\Event...', Object(Symfony\\Component\\EventDispatcher\\EventDispatcher))\\n#10 /var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php(56): Symfony\\Component\\EventDispatcher\\EventDispatcher->callListeners(Array, 'OCP\\\\Share\\\\Event...', Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#11 /var/www/html/lib/private/EventDispatcher/EventDispatcher.php(67): Symfony\\Component\\EventDispatcher\\EventDispatcher->dispatch(Object(OCP\\Share\\Events\\ShareCreatedEvent), 'OCP\\\\Share\\\\Event...')\\n#12 /var/www/html/lib/private/EventDispatcher/EventDispatcher.php(79): OC\\EventDispatcher\\EventDispatcher->dispatch('OCP\\\\Share\\\\Event...', Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#13 /var/www/html/lib/private/Share20/Manager.php(1973): OC\\EventDispatcher\\EventDispatcher->dispatchTyped(Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#14 /var/www/html/lib/private/Share20/Manager.php(730): OC\\Share20\\Manager->dispatchEvent(Object(OCP\\Share\\Events\\ShareCreatedEvent), 'share created')\\n#15 /var/www/html/apps/files_sharing/lib/Controller/ShareAPIController.php(830): OC\\Share20\\Manager->createShare(Object(OC\\Share20\\Share))\\n#16 /var/www/html/lib/private/AppFramework/Http/Dispatcher.php(205): OCA\\Files_Sharing\\Controller\\ShareAPIController->createShare('/Talk/20260505_...', 19, 10, 'oeu5vd8p', NULL, '', NULL, NULL, '', '', NULL, NULL)\\n#17 /var/www/html/lib/private/AppFramework/Http/Dispatcher.php(118): OC\\AppFramework\\Http\\Dispatcher->executeController(Object(OCA\\Files_Sharing\\Controller\\ShareAPIController), 'createShare')\\n#18 /var/www/html/lib/private/AppFramework/App.php(153): OC\\AppFramework\\Http\\Dispatcher->dispatch(Object(OCA\\Files_Sharing\\Controller\\ShareAPIController), 'createShare')\\n#19 /var/www/html/lib/private/Route/Router.php(321): OC\\AppFramework\\App::main('OCA\\\\Files_Shari...', 'createShare', Object(OC\\AppFramework\\DependencyInjection\\DIContainer), Array)\\n#20 /var/www/html/ocs/v1.php(61): OC\\Route\\Router->match('/ocsapp/apps/fi...')\\n#21 /var/www/html/ocs/v2.php(8): require_once('/var/www/html/o...')\\n#22 {main}\"}","CustomMessage":"Error while sending ' . share created . ' event"},"id":"69f978895f7a3"}
{"reqId":"4XXblsazcI3fufsGHwg5","level":3,"time":"2026-05-05T04:55:46+00:00","remoteAddr":"192.168.15.5","user":"908157B5-4844-45BA-A3E1-F2CEBC5BC122","app":"files","method":"POST","url":"/ocs/v2.php/apps/files_sharing/api/v1/shares","scriptName":"/ocs/v2.php","message":"Backends provided no user object for 7D5F1FF2-1119-4E3C-80CD-230C0F8412A2","userAgent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.36 Edg/147.0.0.0","version":"33.0.3.2","exception":{"Exception":"OC\\User\\NoUserException","Message":"Backends provided no user object","Code":0,"Trace":[{"function":"getUserFolder","class":"OC\\Files\\Node\\Root","type":"->","args":["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]},{"file":"/var/www/html/lib/private/Files/Node/LazyFolder.php","line":66,"function":"call_user_func_array","args":[[{"__class__":"OC\\Files\\Node\\Root"},"getUserFolder"],["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]]},{"file":"/var/www/html/lib/private/Files/Node/LazyRoot.php","line":38,"function":"__call","class":"OC\\Files\\Node\\LazyFolder","type":"->","args":["getUserFolder",["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]]},{"file":"/var/www/html/apps/files_sharing/lib/ShareTargetValidator.php","line":70,"function":"getUserFolder","class":"OC\\Files\\Node\\LazyRoot","type":"->","args":["7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"]},{"file":"/var/www/html/apps/files_sharing/lib/ShareRecipientUpdater.php","line":77,"function":"verifyMountPoint","class":"OCA\\Files_Sharing\\ShareTargetValidator","type":"->","args":["*** sensitive parameters replaced ***","*** sensitive parameters replaced ***",{"__class__":"Closure"},["*** sensitive parameters replaced ***"]]},{"file":"/var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php","line":101,"function":"updateForAddedShare","class":"OCA\\Files_Sharing\\ShareRecipientUpdater","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php","line":139,"function":"OCA\\Files_Sharing\\Listener\\{closure}","class":"OCA\\Files_Sharing\\Listener\\SharesUpdatedListener","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php","line":99,"function":"markOrRun","class":"OCA\\Files_Sharing\\Listener\\SharesUpdatedListener","type":"->","args":["*** sensitive parameters replaced ***",{"__class__":"Closure"}]},{"file":"/var/www/html/lib/private/EventDispatcher/ServiceEventListener.php","line":57,"function":"handle","class":"OCA\\Files_Sharing\\Listener\\SharesUpdatedListener","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":220,"function":"__invoke","class":"OC\\EventDispatcher\\ServiceEventListener","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"},"OCP\\Share\\Events\\ShareCreatedEvent",{"__class__":"Symfony\\Component\\EventDispatcher\\EventDispatcher"}]},{"file":"/var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php","line":56,"function":"callListeners","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->","args":[[{"__class__":"Closure"},{"__class__":"Closure"},{"__class__":"Closure"},{"__class__":"Closure"},{"__class__":"Closure"},"And 9 more entries, set log level to debug to see all entries"],"OCP\\Share\\Events\\ShareCreatedEvent",{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/lib/private/EventDispatcher/EventDispatcher.php","line":67,"function":"dispatch","class":"Symfony\\Component\\EventDispatcher\\EventDispatcher","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"},"OCP\\Share\\Events\\ShareCreatedEvent"]},{"file":"/var/www/html/lib/private/EventDispatcher/EventDispatcher.php","line":79,"function":"dispatch","class":"OC\\EventDispatcher\\EventDispatcher","type":"->","args":["OCP\\Share\\Events\\ShareCreatedEvent",{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/lib/private/Share20/Manager.php","line":1973,"function":"dispatchTyped","class":"OC\\EventDispatcher\\EventDispatcher","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"}]},{"file":"/var/www/html/lib/private/Share20/Manager.php","line":730,"function":"dispatchEvent","class":"OC\\Share20\\Manager","type":"->","args":[{"__class__":"OCP\\Share\\Events\\ShareCreatedEvent"},"share created"]},{"file":"/var/www/html/apps/files_sharing/lib/Controller/ShareAPIController.php","line":830,"function":"createShare","class":"OC\\Share20\\Manager","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":205,"function":"createShare","class":"OCA\\Files_Sharing\\Controller\\ShareAPIController","type":"->","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":118,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Files_Sharing\\Controller\\ShareAPIController"},"createShare"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":153,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Files_Sharing\\Controller\\ShareAPIController"},"createShare"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":321,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Files_Sharing\\Controller\\ShareAPIController","createShare",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"_route":"ocs.files_sharing.shareapi.createshare"}]},{"file":"/var/www/html/ocs/v1.php","line":61,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/ocsapp/apps/files_sharing/api/v1/shares"]},{"file":"/var/www/html/ocs/v2.php","line":8,"args":["/var/www/html/ocs/v1.php"],"function":"require_once"}],"File":"/var/www/html/lib/private/Files/Node/Root.php","Line":331,"message":"Backends provided no user object for 7D5F1FF2-1119-4E3C-80CD-230C0F8412A2","exception":"{\"class\":\"OC\\User\\NoUserException\",\"message\":\"Backends provided no user object\",\"code\":0,\"file\":\"/var/www/html/lib/private/Files/Node/Root.php:331\",\"trace\":\"#0 [internal function]: OC\\Files\\Node\\Root->getUserFolder('7D5F1FF2-1119-4...')\\n#1 /var/www/html/lib/private/Files/Node/LazyFolder.php(66): call_user_func_array(Array, Array)\\n#2 /var/www/html/lib/private/Files/Node/LazyRoot.php(38): OC\\Files\\Node\\LazyFolder->__call('getUserFolder', Array)\\n#3 /var/www/html/apps/files_sharing/lib/ShareTargetValidator.php(70): OC\\Files\\Node\\LazyRoot->getUserFolder('7D5F1FF2-1119-4...')\\n#4 /var/www/html/apps/files_sharing/lib/ShareRecipientUpdater.php(77): OCA\\Files_Sharing\\ShareTargetValidator->verifyMountPoint(Object(OC\\User\\LazyUser), Object(OC\\Share20\\Share), Object(Closure), Array)\\n#5 /var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php(101): OCA\\Files_Sharing\\ShareRecipientUpdater->updateForAddedShare(Object(OC\\User\\LazyUser), Object(OC\\Share20\\Share))\\n#6 /var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php(139): OCA\\Files_Sharing\\Listener\\SharesUpdatedListener->OCA\\Files_Sharing\\Listener\\{closure}()\\n#7 /var/www/html/apps/files_sharing/lib/Listener/SharesUpdatedListener.php(99): OCA\\Files_Sharing\\Listener\\SharesUpdatedListener->markOrRun(Object(OC\\User\\LazyUser), Object(Closure))\\n#8 /var/www/html/lib/private/EventDispatcher/ServiceEventListener.php(57): OCA\\Files_Sharing\\Listener\\SharesUpdatedListener->handle(Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#9 /var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php(220): OC\\EventDispatcher\\ServiceEventListener->__invoke(Object(OCP\\Share\\Events\\ShareCreatedEvent), 'OCP\\\\Share\\\\Event...', Object(Symfony\\Component\\EventDispatcher\\EventDispatcher))\\n#10 /var/www/html/3rdparty/symfony/event-dispatcher/EventDispatcher.php(56): Symfony\\Component\\EventDispatcher\\EventDispatcher->callListeners(Array, 'OCP\\\\Share\\\\Event...', Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#11 /var/www/html/lib/private/EventDispatcher/EventDispatcher.php(67): Symfony\\Component\\EventDispatcher\\EventDispatcher->dispatch(Object(OCP\\Share\\Events\\ShareCreatedEvent), 'OCP\\\\Share\\\\Event...')\\n#12 /var/www/html/lib/private/EventDispatcher/EventDispatcher.php(79): OC\\EventDispatcher\\EventDispatcher->dispatch('OCP\\\\Share\\\\Event...', Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#13 /var/www/html/lib/private/Share20/Manager.php(1973): OC\\EventDispatcher\\EventDispatcher->dispatchTyped(Object(OCP\\Share\\Events\\ShareCreatedEvent))\\n#14 /var/www/html/lib/private/Share20/Manager.php(730): OC\\Share20\\Manager->dispatchEvent(Object(OCP\\Share\\Events\\ShareCreatedEvent), 'share created')\\n#15 /var/www/html/apps/files_sharing/lib/Controller/ShareAPIController.php(830): OC\\Share20\\Manager->createShare(Object(OC\\Share20\\Share))\\n#16 /var/www/html/lib/private/AppFramework/Http/Dispatcher.php(205): OCA\\Files_Sharing\\Controller\\ShareAPIController->createShare('/Talk/20260505_...', 19, 10, 'oeu5vd8p', NULL, '', NULL, NULL, '', '', NULL, NULL)\\n#17 /var/www/html/lib/private/AppFramework/Http/Dispatcher.php(118): OC\\AppFramework\\Http\\Dispatcher->executeController(Object(OCA\\Files_Sharing\\Controller\\ShareAPIController), 'createShare')\\n#18 /var/www/html/lib/private/AppFramework/App.php(153): OC\\AppFramework\\Http\\Dispatcher->dispatch(Object(OCA\\Files_Sharing\\Controller\\ShareAPIController), 'createShare')\\n#19 /var/www/html/lib/private/Route/Router.php(321): OC\\AppFramework\\App::main('OCA\\\\Files_Shari...', 'createShare', Object(OC\\AppFramework\\DependencyInjection\\DIContainer), Array)\\n#20 /var/www/html/ocs/v1.php(61): OC\\Route\\Router->match('/ocsapp/apps/fi...')\\n#21 /var/www/html/ocs/v2.php(8): require_once('/var/www/html/o...')\\n#22 {main}\"}","CustomMessage":"Backends provided no user object for 7D5F1FF2-1119-4E3C-80CD-230C0F8412A2"},"id":"69f978895f86a"}

Ok I figured it out.

In case that someone will have similar issue in the future.
Please check if you:

  • had everyone group app enabled
  • have leftover users - if yes - remove them