Good day,
I have the same problem, but unfortunately no working iOs variant. I am 100% sure that I am using the correct password because I use it several times a day for several weeks. I've also tried to uninstall it with App Cleaner and searched the whole Mac for remains. Nevertheless, even older backups cannot be restored. I am 100% sure that I am entering the correct password.
I've tried everything I could find (uninstall including library and reinstall).
lg
Miko