Passwords sync & backup login error

Hello. I can not turn on Avast Passwords Sync & backup option. i am logged in the app with my google account, but Passwords are asking me again to sign in and when I am doing this it crashes with error message: “Sorry, we’ve run into a problem. Please try again later.”
Can anyone help me with this?
Or maybe someone knows how to report this to official Avast support team if this is a bug (since I was not able to write them a simple letter)?

https://forum.avast.com/index.php?board=89.0