After upgrade, Photos thumbnails from shared by other users broken

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Sorry to hear you’re facing problems. :slightly_frowning_face:

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Getting help

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Before clicking submit: Please check if your query is already addressed via the following resources:

(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).

Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can. :heart:

The Basics

  • Nextcloud Server version (e.g., 29.x.x):

    • App Version:

      v32.0.0

      Version:

      v2.1.1

  • Operating system and version (e.g., Ubuntu 24.04):
    • TrueNas
  • Web server and version (e.g, Apache 2.4.25):
    • replace me
  • Reverse proxy and version _(e.g. nginx 1.27.2)
    • HAProxy
  • PHP version (e.g, 8.3):
    • 8.3.26
  • Is this the first time you’ve seen this error? (Yes / No):
    • yes
  • When did this problem seem to first start?
    • After upgrading
  • Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
    • TrueNas app
  • Are you using CloudfIare, mod_security, or similar? (Yes / No)
    • NO

Summary of the issue you are facing:

In Photos, albums shared by other users have broken thumbnails (thumbnails do not load) however, thumbnails for my own photos work.

Steps to replicate it (hint: details matter!):

  1. Go to the “Photos” app

  2. Create an album (upload photos)

  3. Share the album

Log entries

Nextcloud

Please provide the log entries from your Nextcloud log that are generated during the time of problem (via the Copy raw option from Administration settings->Logging screen or from your nextcloud.log located in your data directory). Feel free to use a pastebin/gist service if necessary.

[]}],"File":"/var/www/html/apps/photos/lib/Controller/PreviewController.php","Line":135},"message":"Call to a member function getOwner() on null in file '/var/www/html/apps/photos/lib/Controller/PreviewController.php' line 135","exception":{},"CustomMessage":"Call to a member function getOwner() on null in file '/var/www/html/apps/photos/lib/Controller/PreviewController.php' line 135"}} {"reqId":"remlW0pphdEfSas8g07M","level":2,"time":"2025-10-20T19:47:46+00:00","remoteAddr":"10.0.1.11","user":"slinen","app":"PHP","method":"GET","url":"/index.php/apps/photos/api/v1/preview/248073?etag=93edff2d8e64dd5256c8d55903b8be06&x=64&y=64","message":"Undefined array key 0 at /var/www/html/apps/photos/lib/Album/AlbumMapper.php#209","userAgent":"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36","version":"32.0.0.13","data":{"app":"PHP"}} {"reqId":"remlW0pphdEfSas8g07M","level":3,"time":"2025-10-20T19:47:46+00:00","remoteAddr":"10.0.1.11","user":"slinen","app":"index","method":"GET","url":"/index.php/apps/photos/api/v1/preview/248073?

Web Browser

If the problem is related to the Web interface, open your browser inspector Console and Network tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.

Internal Server Error
The server was unable to complete your request.

If this happens again, please send the technical details below to the server administrator.

More details can be found in the server log.

Technical details
Remote Address: 10.0.1.11
Request ID: PlDUdo20tr7nk5JRzGHz

Web server / Reverse Proxy

The output of your Apache/nginx/system log in /var/log/____:

PASTE HERE

Configuration

Nextcloud

The output of occ config:list system or similar is best, but, if not possible, the contents of your config.php file from /path/to/nextcloud is fine (make sure to remove any identifiable information!):

{
    "system": {
        "htaccess.RewriteBase": "\/",
        "memcache.local": "\\OC\\Memcache\\APCu",
        "apps_paths": [
            {
                "path": "\/var\/www\/html\/apps",
                "url": "\/apps",
                "writable": false
            },
            {
                "path": "\/var\/www\/html\/custom_apps",
                "url": "\/custom_apps",
                "writable": true
            }
        ],
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "password": "***REMOVED SENSITIVE VALUE***",
            "port": 6379
        },
        "upgrade.disable-web": true,
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "32.0.0.13",
        "overwrite.cli.url": "http:\/\/localhost",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "installed": true,
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpmode": "smtp",
        "mail_sendmailmode": "smtp",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpauth": true,
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "overwriteprotocol": "https",
        "overwritehost": "nextcloud.greymatterdynamics.com",
        "preview_imaginary_url": "***REMOVED SENSITIVE VALUE***",
        "maintenance": false,
        "trusted_domains": [
            "10.0.1.3:30027",
            "127.0.0.1",
            "localhost",
            "nextcloud",
            "nextcloud.greymatterdynamics.com"
        ]
    }
}

Apps

The output of occ app:list (if possible).

Enabled:

  • activity: 5.0.0-dev.0
  • admin_audit: 1.22.0
  • announcementcenter: 7.2.2
  • app_api: 32.0.0
  • audiocoverpreview: 0.8.1
  • bruteforcesettings: 5.0.0-dev.0
  • camerarawpreviews: 0.8.8
  • circles: 32.0.0
  • cloud_federation_api: 1.16.0
  • comments: 1.22.0
  • contacts: 8.0.4
  • contactsinteraction: 1.13.1
  • dashboard: 7.12.0
  • dav: 1.34.2
  • federatedfilesharing: 1.22.0
  • federation: 1.22.0
  • files: 2.4.0
  • files_downloadlimit: 5.0.0-dev.0
  • files_external: 1.24.0
  • files_pdfviewer: 5.0.0-dev.0
  • files_reminders: 1.5.0
  • files_sharing: 1.24.0
  • files_trashbin: 1.22.0
  • files_versions: 1.25.0
  • firstrunwizard: 5.0.0-dev.0
  • logreader: 5.0.0-dev.0
  • lookup_server_connector: 1.20.0
  • nextcloud_announcements: 4.0.0-dev.0
  • notifications: 5.0.0-dev.0
  • oauth2: 1.20.0
  • password_policy: 4.0.0-dev.0
  • photos: 5.0.0-dev.1
  • privacy: 4.0.0-dev.0
  • profile: 1.1.0
  • provisioning_api: 1.22.0
  • recommendations: 5.0.0-dev.0
  • related_resources: 3.0.0-dev.0
  • serverinfo: 4.0.0-dev.0
  • settings: 1.15.1
  • sharebymail: 1.22.0
  • spreed: 22.0.0
  • support: 4.0.0-dev.0
  • survey_client: 4.0.0-dev.0
  • systemtags: 1.22.0
  • text: 6.0.0-dev.0
  • theming: 2.7.0
  • twofactor_backupcodes: 1.21.0
  • updatenotification: 1.22.0
  • user_status: 1.12.0
  • viewer: 5.0.0-dev.0
  • weather_status: 1.12.0
  • webhook_listeners: 1.3.0
  • workflowengine: 2.14.0
    Disabled:
  • encryption: 2.20.0 (installed 2.19.0)
  • suspicious_login: 10.0.0-dev.0
  • twofactor_nextcloud_notification: 6.0.0-dev.0
  • twofactor_totp: 14.0.0
  • user_ldap: 1.23.0

Tips for increasing the likelihood of a response

  • Use the preformatted text formatting option in the editor for all log entries and configuration output.
  • If screenshots are useful, feel free to include them.
    • If possible, also include key error output in text form so it can be searched for.
  • Try to edit log output only minimally (if at all) so that it can be ran through analyzers / formatters by those trying to help you.