Install Jellyfin 10.9 unstable on debian 12.5

[pixel24]

If I create the file /etc/apt/sources.list.d/jellyfin.list like this and then run:

Code:

apt update
apt install jellyfin

the installation completes without any errors. However, when I subsequently visit the URL:
http://media02.lan.example.de:8096/

Instead of the setup assistant as in 10.8.13, only the following appears: a symbol representing the server "media02", but attempting to connect does not work.