OH 3: can't log into android app


today I’m upgraded OH from Version 2.6 to 3.0 .
All Things are online after the upgrade and in the Basic UI all pages was unchanged- that’s very nice.
But there is a unexpected problem: I can’t login to my Android app. The username and the password wasn’t changed, so I don’t know what I can do.?
Must I have a client certificate to log on in the new version or what’s going wrong?


The problem is fixed:
With OH 2.x I’d used the credentials from the NGINX - proxy to log into the OH-Android App.
With OH 3 the credentials from the OH-User (equals to the user of the OH-admin-webpage) will be used for the Android-App.
So I set the credentials of the OH-User equals to the credentials of the NGINX-Proxy and it was done.