Calibre container not working

The linuxserver/calibre container used to work a few days ago, but now is stuck on a black screen with a cursor on the main server port after a docker compose down/pull/up yesterday. Reproduced on a different computer and reproduced using an alternate image based on the old aptalca/calibre-rdp.

Logs show:

qt.qpa.plugin: Could not load the Qt platform plugin “xcb” in “” even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

We already issued an update earlier today