Trouble Signing in Google Account
A Gmail account is actually a Google account, because users will receive their Gmail email address when setting up a Google account.
Therefore, when users cannot log in to Gmail through the service’s login page, they cannot log in to Google either.
Some users’ browsers may also display error messages when trying to log in to Gmail. These are some potential fixes for Gmail accounts that can’t log in.
For more reads if there is Trouble Signing in Google Account follow the provided link.