[Bug]: Photos on public shared Maps cannot be displayed

⚠️ 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

Clicking on the preview image triggers two 401 Unauthorized errors:

https://domain.de/index.php/apps/files/api/v1/views
https://domain.de/remote.php/dav/files/undefined/2025_T_0001_NB_IMG_7605.JPG

Opening the photo in the shared folder is working:
https://domain.de/public.php/dav/files/kJBmx3HFyDrmxZS/2025_T_0001_NB_IMG_7605.JPG

Steps to reproduce

1. Create a shared Link
2. Copy link "to the map"
3. Open link in browser
4. The map is displayed with the preview photos
5. Click on a preview photo

Expected behavior

The photo should be desplayed in the image viewer

Installation method

None

Operating system

None

PHP engine version

None

Web server

None

Database engine version

None

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

None

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

None

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

List of activated Apps

Enabled:
  - activity: 4.0.0
  - app_api: 5.0.2
  - bruteforcesettings: 4.0.0
  - calendar: 5.3.8
  - circles: 31.0.0
  - cloud_federation_api: 1.14.0
  - collectives: 3.0.3
  - comments: 1.21.0
  - contacts: 7.2.3
  - contactsinteraction: 1.12.0
  - cookbook: 0.11.3
  - dashboard: 7.11.0
  - dav: 1.33.0
  - deck: 1.15.2
  - drawio: 3.1.0
  - external: 6.0.2
  - federatedfilesharing: 1.21.0
  - federation: 1.21.0
  - files: 2.3.1
  - files_downloadlimit: 4.0.0
  - files_external: 1.23.0
  - files_pdfviewer: 4.0.0
  - files_reminders: 1.4.0
  - files_sharing: 1.23.1
  - files_trashbin: 1.21.0
  - files_versions: 1.24.0
  - firstrunwizard: 4.0.0
  - groupfolders: 19.1.3
  - logreader: 4.0.0
  - lookup_server_connector: 1.19.0
  - mail: 5.1.10
  - maps: 1.6.0
  - metadata: 0.22.0
  - music: 2.2.0
  - nextcloud_announcements: 3.0.0
  - notifications: 4.0.0
  - oauth2: 1.19.1
  - occweb: 0.2.3
  - password_policy: 3.0.0
  - photos: 4.0.0
  - polls: 8.1.4
  - privacy: 3.0.0
  - profile: 1.0.0
  - provisioning_api: 1.21.0
  - quicknotes: 0.8.30
  - recognize: 9.0.3
  - recommendations: 4.0.0
  - related_resources: 2.0.0
  - richdocuments: 8.7.3
  - serverinfo: 3.0.0
  - settings: 1.14.0
  - sharebymail: 1.21.0
  - spreed: 21.1.2
  - support: 3.0.0
  - survey_client: 3.0.0
  - systemtags: 1.21.1
  - text: 5.0.0
  - theming: 2.6.1
  - theming_customcss: 1.18.0
  - twofactor_backupcodes: 1.20.0
  - updatenotification: 1.21.0
  - user_status: 1.11.0
  - viewer: 4.0.0
  - weather_status: 1.11.0
  - webhook_listeners: 1.2.0
  - welcome: 1.3.0
  - whiteboard: 1.1.2
  - workflowengine: 2.13.0
Disabled:
  - admin_audit: 1.21.0
  - encryption: 2.19.0
  - suspicious_login: 9.0.1
  - twofactor_nextcloud_notification: 5.0.0
  - twofactor_totp: 13.0.0-dev.0
  - user_ldap: 1.22.0

Nextcloud Signing status

No errors in log.

Nextcloud Logs

Browser Console

FileSortingConfig.ts:52 
 
 GET https://domain.de/index.php/apps/files/api/v1/views 401 (Unauthorized)
oe	@	FileSortingConfig.ts:52
le	@	FileSortingConfig.ts:31
beforeOpen	@	Viewer.vue:603
openFile	@	Viewer.vue:620
file	@	Viewer.vue:471
Promise.then		
open	@	Viewer.js:331
viewPhoto	@	PhotosLayer.vue:367
onPhotoClick	@	PhotosLayer.vue:363


xhr-request.js:126 
 
 PROPFIND https://domain.de/remote.php/dav/files/undefined/2025_T_0001_NB_IMG_7605.JPG 401 (Unauthorized)
(anonymous)	@	xhr-request.js:126
sB	@	FileInfo.ts:43
request	@	CancelableRequest.js:41
openFile	@	Viewer.vue:651
await in openFile		
file	@	Viewer.vue:471
Promise.then		
open	@	Viewer.js:331
viewPhoto	@	PhotosLayer.vue:367
onPhotoClick	@	PhotosLayer.vue:363

Additional info

The problem exists in v1.4.0 and 1.6.0