Can't sign in to Apple ID, iCloud and internet accounts; probably because of deleted file from Library; how can I fix it?
In the case of Apple ID, I keep getting a message "Verification failed. An unknown error occurred." The same when I try to create a new Apple ID.
My Mac also had automatically logged out from almost all the apps (iCloud, Mail, Calendar etc.) and "Add" button in "Internet Accounts" is inactive, so I can’t add it back.
The most probable cause - I deleted some file/files from the Library folder, but I have no idea which one and how to fix it. [Now I know deleting was a bad idea].
Just in case: my internet connection is ok, I have a correct password, I have no problem to log in at apple.com, the notebook is the only device I’m using Apple ID at.
Please, help me fix this!