Can't log in to Express App

I want to log in to the android app with my existing Adobe account. 

I get the notification "Logging In for User:Florian" but nothing happens.

I just created a second account with my dump mail, and there is no problem to log in with it.

I only have the problem with Express. 

No problem with Creative Cloud, Lightroom, Photoshop Express, Rush, Camera. Just with Express doesn't work.