[Bug]: Sharing a map broken (NC 32 & 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", when I click on "Share" of a custom map, a view opens on the right. However, it does only display the map name on top and has no buttons to actually share the map.

Steps to reproduce

See video:

https://github.com/user-attachments/assets/a500d61e-3a12-4fd6-84f9-ad7888b01488

Expected behavior

As explained by the user guide (https://github.com/nextcloud/maps/#sharing-map), there should be buttons for "Activity", "Comments" and "Sharing" on the view that opens to the right. When clicking on "Sharing", there should be the possibility to share with Nextcloud users or by link.

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

NixOS

PHP engine version

None

Web server

Apache (supported)

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 sharing a custom map from the Maps app, then inspect custom_apps/maps/lib/Service/MyMapsService.php around line 161 and lib/Controller/PageController.php around line 71, where the reported getMimetype() error occurs. Done means the right-hand view provides Activity, Comments, and Sharing controls, including sharing with users or by link.