Comment 4 for bug 1949414

This looks to be due to a change/bug in /etc/profile.d/wsl-integration.sh, provided by the ubuntu-wsl-integration package, which is upgraded from 0.30.0 to 0.31.3 as part of the Impish upgrade.

diff'ing the before and after upgrade (using two different WSL instances) shows that the new version attempts to match the gtk-theme (with the new Impish Yara themes) to the Windows theme (e.g. "dark") using gsettings.

But without the gsettings-desktop-schemas this fails.

Given that the offending issue is in a system-wide profile script, it completely breaks the instance until resolved. This is a pretty serious issue, IMHO. The typical user will not know how to recover at this point.

And yes, launching with something like "wsl -d Ubuntu-CommPrev bash" gets around the issue by starting a non-login shell (and thus not running the profile scripts).

IMHO, either gsettings-desktop-schemas should be added as a dependency of ubuntu-wsl-integration, or the error handling in wsl-integration.sh should fail more gracefully, or both.