[Bug]: Activating custom maps broken on NC 34

⚠️ 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 (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• Maps app is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

On the left navigation under "My maps" there are the default and custom maps. When the Maps application is first started, then the default map is highlighted as active. Deactivating it with a click works.

But re-activating the default map or activating other custom maps does not work. Despite clicking on them, they do not get highlighted as active.

Steps to reproduce

See video:

https://github.com/user-attachments/assets/608603e6-93b9-47d1-89f0-d5b821c320e3

Expected behavior

It should be possible to activate custom maps.

Installation method

I tested this with two new local Nextcloud 34 instances:

• Official Docker image (https://github.com/nextcloud/docker/blob/master/.examples/docker-compose/insecure/postgres/apache/compose.yaml)
• NixOS Nextcloud module with self-signed certificates

Operating system

None

PHP engine version

None

Web server

None

Database engine version

PostgreSQL

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

Fresh Nextcloud Server install

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

Fresh Nextcloud Maps install (never installed before)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

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

Configuration report

{
    "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,
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "localhost:8080"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "pgsql",
        "version": "34.0.3.2",
        "overwrite.cli.url": "http:\/\/localhost:8080",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "installed": true
    }
}

List of activated Apps

Enabled:
  - activity: 7.0.0
  - app_api: 34.0.0
  - appstore: 1.0.0
  - bruteforcesettings: 7.0.0
  - calendar: 6.5.3
  - circles: 34.0.0
  - cloud_federation_api: 1.18.0
  - comments: 1.24.0
  - contacts: 8.7.6
  - contactsinteraction: 1.15.0
  - dashboard: 7.14.0
  - dav: 1.40.0
  - federatedfilesharing: 1.24.0
  - federation: 1.24.0
  - files: 2.6.0
  - files_downloadlimit: 5.2.0
  - files_lock: 34.0.1
  - 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
  - logreader: 7.0.0
  - lookup_server_connector: 1.22.0
  - maps: 1.7.1
  - nextcloud_announcements: 6.0.0
  - notes: 6.0.2
  - 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
  - related_resources: 5.0.0-dev.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_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

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

{"reqId":"FFF7ryacQESgYvqmT4F2","level":2,"time":"2026-08-18T12:31:58+00:00","remoteAddr":"10.89.1.5","user":"--","app":"no app in context","method":"GET","url":"/","scriptName":"/index.php","message":"Host localhost was not connected to because it violates local access rules","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0","version":"","data":[]}
{"reqId":"FFF7ryacQESgYvqmT4F2","level":2,"time":"2026-08-18T12:31:58+00:00","remoteAddr":"10.89.1.5","user":"--","app":"no app in context","method":"GET","url":"/","scriptName":"/index.php","message":"Host localhost was not connected to because it violates local access rules","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0","version":"","data":[]}
{"reqId":"48R6CL6kH7QbiN4mFAhN","level":2,"time":"2026-08-18T12:32:04+00:00","remoteAddr":"10.89.1.5","user":"--","app":"no app in context","method":"POST","url":"/","scriptName":"/index.php","message":"Host localhost was not connected to because it violates local access rules","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0","version":"","data":[]}
{"reqId":"48R6CL6kH7QbiN4mFAhN","level":2,"time":"2026-08-18T12:32:04+00:00","remoteAddr":"10.89.1.5","user":"--","app":"no app in context","method":"POST","url":"/","scriptName":"/index.php","message":"Host localhost was not connected to because it violates local access rules","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0","version":"","data":[]}
{"reqId":"48R6CL6kH7QbiN4mFAhN","level":2,"time":"2026-08-18T12:32:04+00:00","remoteAddr":"10.89.1.5","user":"--","app":"PHP","method":"POST","url":"/","scriptName":"/index.php","message":"Undefined array key \"passwordsalt\" at /var/www/html/lib/private/Setup.php#374","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0","version":"","data":{"app":"PHP"}}
{"reqId":"48R6CL6kH7QbiN4mFAhN","level":2,"time":"2026-08-18T12:32:04+00:00","remoteAddr":"10.89.1.5","user":"--","app":"PHP","method":"POST","url":"/","scriptName":"/index.php","message":"Undefined array key \"secret\" at /var/www/html/lib/private/Setup.php#375","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0","version":"","data":{"app":"PHP"}}
{"reqId":"OrbCm3VJrAqDiHHdeeqi","level":3,"time":"2026-08-18T12:52:05+00:00","remoteAddr":"10.89.1.5","user":"cnp","app":"index","method":"GET","url":"/apps/maps/m/noIcon","scriptName":"/index.php","message":"Call to a member function getMimetype() on null in file '/var/www/html/custom_apps/maps/lib/Service/MyMapsService.php' line 161","userAgent":"Mozilla/5.0 (X11; Linux x86_64; rv:153.0) Gecko/20100101 Firefox/153.0","version":"34.0.3.2","exception":{"Exception":"Exception","Message":"Call to a member function getMimetype() on null in file '/var/www/html/custom_apps/maps/lib/Service/MyMapsService.php' line 161","Code":0,"Trace":[{"file":"/var/www/html/lib/private/AppFramework/App.php","line":137,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Maps\\Controller\\PageController"},"indexMyMap"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":324,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Maps\\Controller\\PageController","indexMyMap",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"_route":"maps.page.indexmymap","myMapId":"noIcon"}]},{"file":"/var/www/html/lib/base.php","line":1172,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/maps/m/noIcon"]},{"file":"/var/www/html/index.php","line":25,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","Line":110,"Previous":{"Exception":"Error","Message":"Call to a member function getMimetype() on null","Code":0,"Trace":[{"file":"/var/www/html/custom_apps/maps/lib/Controller/PageController.php","line":71,"function":"getMyMap","class":"OCA\\Maps\\Service\\MyMapsService","type":"->","args":[0,"cnp"]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":165,"function":"indexMyMap","class":"OCA\\Maps\\Controller\\PageController","type":"->","args":[0,{"__class__":"OCA\\Maps\\Service\\MyMapsService"}]},{"file":"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php","line":78,"function":"executeController","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Maps\\Controller\\PageController"},"indexMyMap"]},{"file":"/var/www/html/lib/private/AppFramework/App.php","line":137,"function":"dispatch","class":"OC\\AppFramework\\Http\\Dispatcher","type":"->","args":[{"__class__":"OCA\\Maps\\Controller\\PageController"},"indexMyMap"]},{"file":"/var/www/html/lib/private/Route/Router.php","line":324,"function":"main","class":"OC\\AppFramework\\App","type":"::","args":["OCA\\Maps\\Controller\\PageController","indexMyMap",{"__class__":"OC\\AppFramework\\DependencyInjection\\DIContainer"},{"_route":"maps.page.indexmymap","myMapId":"noIcon"}]},{"file":"/var/www/html/lib/base.php","line":1172,"function":"match","class":"OC\\Route\\Router","type":"->","args":["/apps/maps/m/noIcon"]},{"file":"/var/www/html/index.php","line":25,"function":"handleRequest","class":"OC","type":"::","args":[]}],"File":"/var/www/html/custom_apps/maps/lib/Service/MyMapsService.php","Line":161},"message":"Call to a member function getMimetype() on null in file '/var/www/html/custom_apps/maps/lib/Service/MyMapsService.php' line 161","exception":"{\"class\":\"Exception\",\"message\":\"Call to a member function getMimetype() on null in file '/var/www/html/custom_apps/maps/lib/Service/MyMapsService.php' line 161\",\"code\":0,\"file\":\"/var/www/html/lib/private/AppFramework/Http/Dispatcher.php:110\",\"trace\":\"#0 /var/www/html/lib/private/AppFramework/App.php(137): OC\\AppFramework\\Http\\Dispatcher->dispatch(Object(OCA\\Maps\\Controller\\PageController), 'indexMyMap')\\n#1 /var/www/html/lib/private/Route/Router.php(324): OC\\AppFramework\\App::main('OCA\\\\Maps\\\\Contro...', 'indexMyMap', Object(OC\\AppFramework\\DependencyInjection\\DIContainer), Array)\\n#2 /var/www/html/lib/base.php(1172): OC\\Route\\Router->match('/apps/maps/m/no...')\\n#3 /var/www/html/index.php(25): OC::handleRequest()\\n#4 {main}\",\"previous\":{\"class\":\"Error\",\"message\":\"Call to a member function getMimetype() on null\",\"code\":0,\"file\":\"/var/www/html/custom_apps/maps/lib/Service/MyMapsService.php:161\",\"trace\":\"#0 /var/www/html/custom_apps/maps/lib/Controller/PageController.php(71): OCA\\Maps\\Service\\MyMapsService->getMyMap(0, 'cnp')\\n#1 /var/www/html/lib/private/AppFramework/Http/Dispatcher.php(165): OCA\\Maps\\Controller\\PageController->indexMyMap(0, Object(OCA\\Maps\\Service\\MyMapsService))\\n#2 /var/www/html/lib/private/AppFramework/Http/Dispatcher.php(78): OC\\AppFramework\\Http\\Dispatcher->executeController(Object(OCA\\Maps\\Controller\\PageController), 'indexMyMap')\\n#3 /var/www/html/lib/private/AppFramework/App.php(137): OC\\AppFramework\\Http\\Dispatcher->dispatch(Object(OCA\\Maps\\Controller\\PageController), 'indexMyMap')\\n#4 /var/www/html/lib/private/Route/Router.php(324): OC\\AppFramework\\App::main('OCA\\\\Maps\\\\Contro...', 'indexMyMap', Object(OC\\AppFramework\\DependencyInjection\\DIContainer), Array)\\n#5 /var/www/html/lib/base.php(1172): OC\\Route\\Router->match('/apps/maps/m/no...')\\n#6 /var/www/html/index.php(25): OC::handleRequest()\\n#7 {main}\"}}","CustomMessage":"Call to a member function getMimetype() on null in file '/var/www/html/custom_apps/maps/lib/Service/MyMapsService.php' line 161"}}

Browser Console

Additional info

No response

Reproduce the activation failure in the Maps app, then start at lib/Service/MyMapsService.php line 161 and lib/Controller/PageController.php line 71 for the /apps/maps/m/noIcon route. Trace why getMyMap returns no file object when a map is selected. Done means the default and custom maps can be activated and the null getMimetype() error no longer occurs.