So, no one else anywhere is having this problem? Even after restarting from scratch in accordance with the wiki (https://github.com/nextcloud/nextcloud-snap/wiki/How-to-restart-from-scratch) I have the same problem.

BTW, the wiki is one of those documents apparently written by someone who knows exactly what they are doing but which isn’t that helpful to anyone who doesn’t already know exactly what to do. My 2 pfennigs.