Found a possible solution to this problem in this thread:
Basically, if you have any cross-filesystem symlinks, apparmor doesn’t like that and so you need to replace them with “bind mounts” that you set up in /etc/fstab.
Worked for me after having problems with getting authy to run on Ubuntu and Fedora after the first run.
This worked for me,too. I did have some links into my owncloud directory.
Thank you for the fix. But I think this shouĺd be resolved in snap or in the application. I find it unacceptable that I canot use softlinks in my home directory when using some random choice of apps.