Error/stop during account creation

Just got my T1M and it looks great. However, when I created an Account in the app, got my mail.

After login in the app the sign “We are setting up your Job site” appers. After a short time the “Close” Button appers in the popup. But the button does nothing.

So actually it is not possible to use the app.

I have already reboot the device, stoped the app and cleared the cache of the app. I use the android version.

What should I do?

Best regards