Support intro
Sorry to hear you’re facing problems. 
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The Basics
- Nextcloud Server version
31.0.8/ AIO v11.7.0
- Operating system and version
Docker on Debian 12
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
AIO
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
no
Summary of the issue you are facing:
/.well-known/assetlinks.json: {“message”:“assetlinks.json not supported”}
On Android 12 or newer, when we click on a link like https://cloud.example.com/f/49489,
this link opens in browser. There is no way to open this link in the Mobile App.
says that it may help to provide a “assetlinks.json” on the server.
Is it possible to add this file on a AIO installation?