That's no good. It's a bit hard to guess what went wrong though.
There was a bug a bit like this on Ubuntu that was solved by rebooting.
Have you rebooted since this problem happened?
Otherwise, I recommend posting at forum.snapcraft.io, there are more people
who can help there. I doubt the
Package: snapd
Version: 2.30-5+b1
Severity: important
Running Debian Testing, up to date.
No idea what provoked this exactly, but:
$ snap list
Name Version Rev Developer Notes
core 4206 canonical broken
skype 23skype broken
$ snap run
2 matches
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