Snaps in General (but including snap-store) Not working on 21.04

[Christopher]

I was working with snapd folks on a ZFS related snap, and I mentioned that there were several Snaps that seem to be non-functional on 21.04 that work fine on 20.04. Some of the errors seem to be wayland related, but most still fail to launch on an "X" session. snap-store is one of them. After using the workaround noted in Bug 1922293 (https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1922293/comments/7) I can see the snap-store snap available (snipped some snaps):

```
> snap list
Name Version Rev Tracking Publisher Notes
...
qownnotes 21.3.9 8183 latest/stable pbek -
slack 4.14.0 38 latest/stable slack✓ classic
snap-store 3.38.0-59-g494f078 518 latest/stable/… canonical✓ -
snapd 2.49.1 11402 latest/stable canonical✓ snapd
telegram-desktop 2.7.1 2551 latest/stable telegram.desktop -
```

However when launching snap-store from the "normal gui" menu nothing comes up. When launching from CLI I get the following error:

```
> snap-store
sed: can't read /home/chalbersma/.config/user-dirs.dirs: Permission denied
/snap/snap-store/518/snap/command-chain/desktop-launch: line 251: /home/chalbersma/.config/user-dirs.dirs: Permission denied
cp: cannot open '/home/chalbersma/.config/user-dirs.locale' for reading: Permission denied
/snap/snap-store/518/snap/command-chain/desktop-launch: line 256: /home/chalbersma/.config/user-dirs.locale: Permission denied
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
realpath: '': No such file or directory
cp: cannot stat '/snap/snap-store/518/gnome-platform/usr/share/mime': No such file or directory
Directory '/home/chalbersma/snap/snap-store/518/.local/share/mime/packages' does not exist!
/snap/snap-store/518/snap/command-chain/desktop-launch: line 20: /snap/snap-store/518/gnome-platform/usr/lib/x86_64-linux-gnu/libgtk-3-0/gtk-query-immodules-3.0: No such file or directory
ERROR: update-mime-database /home/chalbersma/snap/snap-store/518/.local/share/mime exited abnormally with status 1
ERROR: /snap/snap-store/518/gnome-platform/usr/lib/x86_64-linux-gnu/libgtk-3-0/gtk-query-immodules-3.0 exited abnormally with status 127
/snap/snap-store/518/usr/bin/snap-store: error while loading shared libraries: libgdk_pixbuf-2.0.so.0: cannot open shared object file: No such file or directory
```

I'm also getting various failures to launch on all non-classic snaps that I've tried, including keepassxc, beekeper-studio, qownnotes, kate and telegram-desktop. The only non-classic snap I've tried that works has been hello-world. I'm thinking there might be another mounting/zfs problem here, but I don't know where to look.

[Christopher (chalbersma-12)]

Just an update, I was playing with it. I did find a workaround. If after the workaround in the other bug, you remove then reinstall the snaps it does start to work.