[Bug]: Nextcloud Office with my Collabora server no longer works with mobile devices from version 34.0

[CyberZeus]

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Documents can be open with web browser using Nextcloud Office and custom Collabora server, but it doesn't work with Nextcloud mobile apps.
On iOS, it says that the page is not found while on Android it loads indefinitely and nothing more appears but the loading circle.
It happens right after the upgrade to version 34.0.

Steps to reproduce

1. Create a document (ods or xlsx)
2. Edit it with the browser
3. Try to open on mobile app

Expected behavior

The document has to be open by the mobile app

Nextcloud Server version

34

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Apache (supported)

Database engine version

MariaDB

Is this bug present after an update or on a fresh install?

Upgraded to a MAJOR version (ex. 31 to 32)

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***",
            "127.0.0.1",
            "localhost",
            "***REMOVED SENSITIVE VALUE***"
        ],
        "trusted_proxies": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "https:\/\/nextcloud.cyberhouse.dnsalias.com",
        "htaccess.RewriteBase": "\/",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "34.0.0.12",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbport": "",
        "dbtableprefix": "oc_",
        "mysql.utf8mb4": true,
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "default_phone_region": "IT",
        "maintenance": false,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "maintenance_window_start": 1,
        "mail_smtpmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_sendmailmode": "smtp",
        "mail_smtpport": "465",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauth": 1,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpsecure": "ssl",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 6379,
            "timeout": 0,
            "password": "***REMOVED SENSITIVE VALUE***"
        },
        "updater.release.channel": "stable",
        "loglevel": 2,
        "updatedirectory": "\/var\/nextcloud-update",
        "app_install_overwrite": [
            "richdocuments",
            "impersonate",
            "twothousandandfortyeight"
        ],
        "serverid": "0"
    }
}

List of activated Apps

Enabled:
  - activity: 7.0.0
  - appstore: 1.0.0
  - bruteforcesettings: 7.0.0
  - calendar: 6.4.2
  - cloud_federation_api: 1.18.0
  - comments: 1.24.0
  - contacts: 8.5.1
  - contactsinteraction: 1.15.0
  - dashboard: 7.14.0
  - dav: 1.39.0
  - federatedfilesharing: 1.24.0
  - federation: 1.24.0
  - files: 2.6.0
  - files_downloadlimit: 5.2.0-dev.0
  - files_lock: 34.0.0
  - files_pdfviewer: 7.0.0-dev.0
  - files_reminders: 1.7.0
  - files_sharing: 1.26.0
  - files_trashbin: 1.24.0
  - files_versions: 1.27.0
  - firstrunwizard: 7.0.0-dev.0
  - impersonate: 4.0.0
  - logreader: 7.0.0
  - lookup_server_connector: 1.22.0
  - mail: 5.9.1
  - nextcloud_announcements: 6.0.0
  - notes: 6.0.0
  - notifications: 7.0.0-dev.1
  - oauth2: 1.22.0
  - office: 1.0.0
  - password_policy: 6.0.0-dev.0
  - photos: 7.0.0
  - privacy: 6.0.0-dev.1
  - profile: 1.3.0
  - provisioning_api: 1.24.0
  - recommendations: 7.0.0-dev.0
  - related_resources: 5.0.0-dev.0
  - richdocuments: 11.0.0
  - serverinfo: 6.0.0
  - settings: 1.17.0
  - sharebymail: 1.24.0
  - support: 6.0.0
  - survey_client: 6.0.0-dev.0
  - systemtags: 1.24.0
  - text: 8.0.0
  - theming: 2.9.0
  - twofactor_backupcodes: 1.23.0
  - twofactor_nextcloud_notification: 8.0.0
  - twofactor_totp: 16.0.0
  - updatenotification: 1.24.0
  - user_status: 1.14.0
  - viewer: 7.0.0-dev.0
  - weather_status: 1.14.0
  - webhook_listeners: 1.6.0
  - workflowengine: 2.16.0
Disabled:
  - admin_audit: 1.24.0
  - app_api: 34.0.0 (installed 32.0.0)
  - circles: 34.0.0 (installed 31.0.0-dev.0)
  - encryption: 2.22.0
  - files_external: 1.26.0
  - spreed: 23.0.4 (installed 23.0.4)
  - suspicious_login: 12.0.0-dev.0
  - testing: 1.23.0
  - user_ldap: 1.25.0

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"bwNbdS96CDAG75lfRLuV","level":3,"time":"2026-06-12T13:33:40+00:00","remoteAddr":"192.168.1.12","user":"davide","app":"index","method":"GET","url":"/index.php/core/preview?fileId=228454&x=1024&y=1024&a=1&mode=cover&forceIcon=0&mimeFallback=0&etag=6a2ba67801075","scriptName":"/index.php","message":"fclose(): supplied resource is not a valid stream resource in file '/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php' line 73","userAgent":"Mozilla/5.0 (iOS) Nextcloud-iOS/33.0.9","version":"34.0.0.12","exception":{"Exception":"Exception","Message":"fclose(): supplied resource is not a valid stream resource in file '/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php' line 73","Code":0,"Trace":[{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":137,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":324,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1159,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","Line":110,"Previous":{"Exception":"TypeError","Message":"fclose(): supplied resource is not a valid stream resource","Code":0,"Trace":[{"file":"/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php","line":73,"function":"fclose","args":["*** sensitive parameters replaced ***"]},{"file":"/var/www/nextcloud/apps/richdocuments/lib/Preview/Office.php","line":56,"function":"convertFileTo","class":"OCA\\Richdocuments\\Service\\RemoteService","type":"->"},{"file":"/var/www/nextcloud/lib/private/Preview/GeneratorHelper.php","line":25,"function":"getThumbnail","class":"OCA\\Richdocuments\\Preview\\Office","type":"->"},{"file":"/var/www/nextcloud/lib/private/Preview/Generator.php","line":382,"function":"getThumbnail","class":"OC\\Preview\\GeneratorHelper","type":"->"},{"file":"/var/www/nextcloud/lib/private/Preview/Generator.php","line":336,"function":"generateProviderPreview","class":"OC\\Preview\\Generator","type":"->"},{"file":"/var/www/nextcloud/lib/private/Preview/Generator.php","line":127,"function":"getMaxPreview","class":"OC\\Preview\\Generator","type":"->"},{"file":"/var/www/nextcloud/lib/private/Preview/Generator.php","line":95,"function":"generatePreviews","class":"OC\\Preview\\Generator","type":"->"},{"file":"/var/www/nextcloud/lib/private/PreviewManager.php","line":183,"function":"getPreview","class":"OC\\Preview\\Generator","type":"->"},{"file":"/var/www/nextcloud/core/Controller/PreviewController.php","line":166,"function":"getPreview","class":"OC\\PreviewManager","type":"->"},{"file":"/var/www/nextcloud/core/Controller/PreviewController.php","line":128,"function":"fetchPreview","class":"OC\\Core\\Controller\\PreviewController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":165,"function":"getPreviewByFileId","class":"OC\\Core\\Controller\\PreviewController","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php","line":78,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/AppFramework/App.php","line":137,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->"},{"file":"/var/www/nextcloud/lib/private/Route/Router.php","line":324,"function":"main","class":"OC\\AppFramework\\App","type":"::"},{"file":"/var/www/nextcloud/lib/base.php","line":1159,"function":"match","class":"OC\\Route\\Router","type":"->"},{"file":"/var/www/nextcloud/index.php","line":25,"function":"handleRequest","class":"OC","type":"::"}],"File":"/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php","Line":73},"message":"fclose(): supplied resource is not a valid stream resource in file '/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php' line 73","exception":"{\"class\":\"Exception\",\"message\":\"fclose(): supplied resource is not a valid stream resource in file '/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php' line 73\",\"code\":0,\"file\":\"/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php:110\",\"trace\":\"#0 /var/www/nextcloud/lib/private/AppFramework/App.php(137): OC\\AppFramework\\Http\\Dispatcher->dispatch()\\n#1 /var/www/nextcloud/lib/private/Route/Router.php(324): OC\\AppFramework\\App::main()\\n#2 /var/www/nextcloud/lib/base.php(1159): OC\\Route\\Router->match()\\n#3 /var/www/nextcloud/index.php(25): OC::handleRequest()\\n#4 {main}\",\"previous\":{\"class\":\"TypeError\",\"message\":\"fclose(): supplied resource is not a valid stream resource\",\"code\":0,\"file\":\"/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php:73\",\"trace\":\"#0 /var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php(73): fclose()\\n#1 /var/www/nextcloud/apps/richdocuments/lib/Preview/Office.php(56): OCA\\Richdocuments\\Service\\RemoteService->convertFileTo()\\n#2 /var/www/nextcloud/lib/private/Preview/GeneratorHelper.php(25): OCA\\Richdocuments\\Preview\\Office->getThumbnail()\\n#3 /var/www/nextcloud/lib/private/Preview/Generator.php(382): OC\\Preview\\GeneratorHelper->getThumbnail()\\n#4 /var/www/nextcloud/lib/private/Preview/Generator.php(336): OC\\Preview\\Generator->generateProviderPreview()\\n#5 /var/www/nextcloud/lib/private/Preview/Generator.php(127): OC\\Preview\\Generator->getMaxPreview()\\n#6 /var/www/nextcloud/lib/private/Preview/Generator.php(95): OC\\Preview\\Generator->generatePreviews()\\n#7 /var/www/nextcloud/lib/private/PreviewManager.php(183): OC\\Preview\\Generator->getPreview()\\n#8 /var/www/nextcloud/core/Controller/PreviewController.php(166): OC\\PreviewManager->getPreview()\\n#9 /var/www/nextcloud/core/Controller/PreviewController.php(128): OC\\Core\\Controller\\PreviewController->fetchPreview()\\n#10 /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(165): OC\\Core\\Controller\\PreviewController->getPreviewByFileId()\\n#11 /var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php(78): OC\\AppFramework\\Http\\Dispatcher->executeController()\\n#12 /var/www/nextcloud/lib/private/AppFramework/App.php(137): OC\\AppFramework\\Http\\Dispatcher->dispatch()\\n#13 /var/www/nextcloud/lib/private/Route/Router.php(324): OC\\AppFramework\\App::main()\\n#14 /var/www/nextcloud/lib/base.php(1159): OC\\Route\\Router->match()\\n#15 /var/www/nextcloud/index.php(25): OC::handleRequest()\\n#16 {main}\"}}","CustomMessage":"fclose(): supplied resource is not a valid stream resource in file '/var/www/nextcloud/apps/richdocuments/lib/Service/RemoteService.php' line 73"}}

Additional info

No response

[elzody]

My instincts tell me it could be related to #5656, but will need to dig deeper. Maybe the mobile clients don't use it yet?

[kujakob]

I can confirm this issue with the following setup:

Nextcloud Server: 34.0.0
richdocuments: 11.0.0
Collabora Online: 26.04.1.4 (external container)
Nextcloud iOS App: 33.0.9.1 (Matheria)
Behavior:

Opening Office files (e.g. .xlsx) in the native iOS app returns "Page not found" (Nextcloud 404 page)
The same files open correctly in Safari on iPhone (web session works)
Desktop browser works without any issues
From the iOS app log:
The app successfully calls /ocs/v2.php/apps/richdocuments/api/v1/document (success, 211 bytes), but the returned URL (files.DirectEditingView.edit) fails in the WKWebView because it requires an active web session which the native app's WKWebView does not have.

[kybrcore]

Same here, can confirm on a completely different setup (so this is not reverse-proxy specific).

Versions

• Nextcloud Server 34.0.0
• Office / richdocuments 11.0.0
• Collabora Online (collabora/code) 25.04
• iOS app: Nextcloud-iOS/33.0.9
• Reverse proxy: Caddy (plain reverse_proxy backend:80, no path rewrites/redirects)

Symptom
Opening a .docx from the iOS app shows "Page not found - The page could not be found on the server or you may not be allowed to view it." Editing the same file in a desktop/Safari browser works fine (Collabora loads normally).

What the web server access log shows for the iOS flow:

POST /ocs/v2.php/apps/richdocuments/api/v1/document          -> 200
GET  /apps/files/directEditing/<token>                       -> 404   (returns the full ~30KB NC "page not found" HTML)

So the direct-editing token is issued successfully, but the follow-up GET /apps/files/directEditing/<token> route 404s. The browser flow never hits this route (it uses the richdocuments iframe), which is why only the mobile apps are affected.

Ruled out on my side:

• Reverse proxy: backend is proxied verbatim, no index.php stripping / no path filtering. Other /apps/... routes (e.g. /apps/richdocuments/settings/fonts.json) return 200/304 fine.
• Config is clean: overwrite.cli.url / overwriteprotocol correct, richdocuments wopi_url / public_wopi_url / wopi_allowlist all correct (no stale host/port).

The 404 is not logged in nextcloud.log (it's a router 404, only visible in the web server access log), which may be why it's been hard to triage.

[CyberZeus]

Any news on this?
I really need to edit documents from mobile devices.
Thanks

[StijnVanhandsaeme]

I see the same behavior with

• Nextcloud 34.0.0
• Richdocuments 11.0.0
• Collabora Online COOLWSD 25.04.9.4
• Nextcloud Android app 33.1.0

and also the 404 on /apps/files/directEditing/

[PhilippBischoff0]

I see same behavior with

• Nextcloud 34.0.0
• richdocuments 11.0.0
• Collabora Online Development Edition 26.04.1.4
• Nextcloud Android app 34.0.0 and dev 20260507

Additional information from Collabora logs

When attempting to open a document via the Android app, Collabora logs show the WOPI token is considered expired:
expiryEpoch (TTL): 0ms Thu Jan 01 00:00:00.000 1970 (494965h ago)

Data loss detected [...] but Quarantine is disabled.
Destroying DocumentBroker while having session with 2 references

nextcloud server log shows the same error as CyberZeus

For anyone in the need to edit documents on mobile - there is a seperate collabora online app that works with an okay integration of the nextcloud filesystem.