A new upstream major release of GNOME Shell is available in
experimental, and as usual, all GNOME Shell extensions will need updates
to be compatible with the new version.

Upstream provides a migration guide here:
<https://gjs.guide/extensions/upgrading/gnome-shell-50.html>

and there is some Debian-specific documentation here:
<https://salsa.debian.org/gnome-team/gnome-shell/-/blob/debian/latest/debian/updating-extensions.md?ref_type=heads>

This extension is already fixed in experimental, but I haven't uploaded
the fixed version to unstable yet (I'd prefer to wait for either an
upstream release, or the transition starting).

     smcv