I think that I found what was causing the new login problem, that affects only the very recent Android app updates.
My official Username for Vera is, and always has been my Gmail address, which I have used for login everywhere, with no problem, until now.
Some months ago I designated my Outlook.com Email address for Notifications from Vera. That was never a problem until now.
I just discovered that I can log into the Vera mobile app, using my Outlook.com Email address, along with the same Password that I use for logging into Vera.
For reasons that are not understood by me, I can still login via a browser using my Gmail address/Password combo, as always, but when logging in on the current Android Mobile app, it rejects that same Gmail address/Password combo, but accepts the Outlook Email/Password combo. I don’t know if that odd login will cause other issues, or not at this point, but it really feels like a bug in the newer app versions.