A problem has occurred and the system can't recover

Please help!
Login screen does not come.
Switching to a different terminal works by ctl+alt+f2/f3 etc. Terminal command “startx” starts xfce desktop.
Tried this solution- https://clearlinux.org/documentation/clear-linux/guides/maintenance/fix-broken-install
Fixed some problems. But still giving this error.

This is a Gnome crash, and a bad one. We’d need to see lots of system logs to figure out what is going on, as well as know what kind of system you have. The best way to tackle the problem would be through a github issue - forums are not good bug trackers.

Yes, an example is: https://github.com/clearlinux/distribution/issues/749