The more complete solution is entirely removing snap. I did that long ago, but my process was a little painful. From my logs, it went something like this:
snap list
snap remove <copy-paste packages from above>
sudo service snapd restart # core is tricky to get rid of
sudo snap remove core
snap list # check it's empty
sudo apt install gnome-calculator gnome-characters gnome-logs gnome-system-monitor
sudo apt purge snapd squashfs-tools gnome-software-plugin-snap
rm -r ~/snap
