Oauth2clients not working after upgrade to 7.14.4

Hallo everyone.

I have had a good functional 7.14.2 running.
Than i upgraded to 7.14.4 and no I am having trouble with the crm.

The most things where small stuff I could handle alone.
But no I found a problem I have absolutely no idea how to fix.

My oath2client module seems to be broken.
When I want to create a new password grant or client redential grant and i click on the “new” button. The system shows me a blank page with nothing but 2 save and canel buttons.
if i click save it creates an empty password grant item no matter if i tried to create a client cred grant or a password grant.
I searched the quellcode compared it to the 7.14.2 and the module is there. The views are there. Metadata… everything… there does not seem to be a difference.
I searched the log and there does not to seem to be an error.
I searched if there is a overwite in the custom folder but could not find one.

Does anyone of you has the same problem?
Does anyone of you has any idea what i can try to fix it?
Any idea is welcome.