Whenever I try to launch apps I installed using snapd after upgrading my workstation to Fedora 33, I get errors. I have put the error message in the photo
Can you check whether it works in X11 session? I believe it may be this problem: https://bugzilla.redhat.com/show_bug.cgi?id=1883621 which is fixed in mutter: https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1424 and snapd 2.48 contains a workaround, but I haven’t had the time to update the package yet.
In the meantime, I haven’t found a bug for mutter not listening for abstract sockets in RHBZ, so feel free to file one and point them to the merge request.