Not able to log in (acrobat dc)

I have the problem that I can log into the adobe creativ cloud but if I open acrobat dc from there im not logged in the app. So I can't really use acrobat dc because i can't get into the adobe document cloud and share files there. 

There is a button where I could log in but if i click on it nothing happens :(.

Anmelden = log in

And I'm logged into the creativ cloud but somehow not in the app.

Thanks for the help!