Testing new version of snap (2.49.1) by installing some packages found this error.
$ sudo snap install snap-store error: cannot perform the following tasks: - Run configure hook of "snap-store" snap if present (run hook "configure": cannot open file /sys/fs/cgroup/freezer/snap.snap-store/cgroup.procs: Permission denied) $ sudo snap install notepad-plus-plus error: cannot perform the following tasks: - Run configure hook of "notepad-plus-plus" snap if present (run hook "configure": cannot open file /sys/fs/cgroup/freezer/snap.notepad-plus-plus/cgroup.procs: Permission denied)
While in Boxes I have Solus Gnome with snap-store installed, before the update it was running fine, but after switching to unstable repository and updating the system, it doesn't run:
$ snap-store cannot open /sys/fs/cgroup/devices/snap.snap-store.snap-store: Permission denied
Both give same error.