First I would like to say that Login ("Anmelden" in German) lasts very long (more than 1 minute or so).
I selected "settings" and after that "synchronization and backup". If I would like to activate synchonization there are three possibilities "connect device, Login, create account".
As I do not have another device I choose Login. But Login last very long and after that I have a menu where I can adjust my account but synchronization or backup is not possible.
I can choose social media or receive e-mails for certain purposes but there is no synchronization button or "back" button. If I press back on my mobile device I have to login first and the endless loop continues (including this very long lasting login procedure). There is no possibility to start synchronization.

If I login before choosing settings then I will see this turning circle and it does no go on.
(Did I tell you that logging in lasts very long?)
If there is any other message it is "429" and the german message means "too many requests". But this is annoying because the "many requests" are a results of not good working opera software. Who forces me to log in again and again and again and again? I did not log out!

Hi Guys, test your software after coding!