@czwartegokwietnia
Same thing. Over And Over,

Temporary Server Error. Please try again later. - On Android Temporary Server Error. Please try again later. - On Desktop OR sign in to reconnect sync (for who knows what reason, was previously connected) enter credentials, sign in, and it just Spins And Never Ccompletes.

And No, clearing sync data does not help, and also your suggestion to the poster above, did you not read? How often and what method do you use when you do it, have you tried to clear your previously synced data from a new install?