openSuse 15.5 KDE & Virtualbox Windows 10 can't log in

I have a Windows 10 VM (previously Windows 7), which has run well in the past several versions of openSuse.  However now, when I try to run it, it opens to the point where I have to hit enter to get the password box, but as soon as I do that, the screen briefly shows the login screen and then reverts back to where it was. Also, I don't see Virtual Box on the taskbar. Any ideas? tnx jk