Fabrizio, can you try to log in again, and tell me if it works now?
We found out the possible reason for this issue. It seems that you used to log in through a third-party service (Google/Facebook, etc.) so you don’t have a separate password. You need to log into your account on the website and reset your password in your profile, and then log into the app.
I just reset my password and it seems to work. Thank you.