SOLVED: Android app doesn't load anymore. Plus web address changed after update

[TheDreadPirate]

1) You need to update jellyfin-ffmpeg. It looks like you are still using 5.1.4
sudo apt install jellyfin-ffmpeg6

2) Your server looks fine otherwise.

What address are you typing into your Android client? If you haven't set any subdomains in the Jellyfin config or reverse proxy you should just be providing the address and port. I think what you are seeing in the browser are redirects that don't apply to Android.