Install a stable release

I’m using a completely new Raspberry 5 installation (Bookworm, 64-bit, Lite), on which the update to the master branch worked flawlessly 11 days ago. Now, a fresh installation on the master branch results in a black screen, upgrading the containers doesn’t help either, and an installation on v0.20.5 fails with an error message. How can I install a stable version of Anthias?

The last release should work - but an update is in the work that should resolve things shortly.