Thanks - Found the Beta Forum but could not subscribe:
"SQL Database errors only visible to admin" very cool!
I was upgrading to 65.b4 from 64.2.
Does not matter for the problem. A login-failure WITHOUT ANY feedback should not happen in any case. Looking at the source code shows that there was no line of code was spend in providing a feedback. How can I know what went wrong.
I am not so confident at the moment about the new version, I must say.
Greetings
Carl