Hello all, I have the same issue now, and after some googling I found this thread. So this problem started suddenly today. Nothing seems to work so far to resolve this. Keychain Access is giving error messages (unknown error, keychain not found etc.) Resetting the keychains doesn't work (won't reset). Would be really happy to see a solution come up. I'm currently downloading the Catalina 10.15.7 update, and I will let you know whether it works for me or not.
Log out of Apple id in settings. This worked for me so far. But I didn’t dare to log in again until nowExactly the same problem. It started Friday 25. MacBook Pro 13 inch completely useless. ?. I need to work for school?. Do you know what I could do ?
I don’t know if it has something to do with 10.15.7. I didn’t install this one until now. I would suspect some Apple internal server error since this issue appeared although I didn’t change any part of the system.I think That this 10.15.7 Update just killed the Mail App more than she was before ??. They sell us fitness programs and game subscription but they can’t even make a working mailing application ??. I don’t know if I need to laugh or to cry ??