Passwords firefox exension no longer shown and passwords (Chromium working fine)

I’ve been happily using the Passwords app for nextcloud and the official extensions for firefox and Chrome for several years now. Recently (I’m not sure exactly when) the Firefox extension stopped working. It now shows that I have no passwords.

The extension in chromium on the same machine is working fine. Can anyone suggest the problem?

I have tried removing the account from the extension settings and creating it again (from the Passwords->More->Apps & Extensions), but syncing still doesn’t work. More Info:

Nextcloud version: 26.0.1
php version: 8.1
Nextcloud passwords App version: 2023.5.30
Firefox extension version: 2.2.6
Firefox version: 112.0.2 (64-bit