I can't sign in to my Creative Cloud

1. Open Creative Cloud on my laptop (win 10)

2. Screen with "Signed out...-> sign in"

3. click on "sign in"

4. for a short moment the "sign in" screen appears 

5. after that a white screen with "loading Creative Cloud" 

6. after some time -> same as 2

=> repeat forever

(as I'm writing this, sometimes no 5. is "unable to reach Adobe servers" and when I click on "retry" the "Signed out" message appears again)

I reinstalled it a few times but its always the same :c

(bought it like a week ago)