Google Logins Not Working
I just upgraded to an iPhone 12 Pro Max running iOS 14.4.2 and have not been able to log into Mail or any app that uses a Google login.
When I try to enter my login credentials for Mail, it takes me to a Google login page in Safari and then one of the following things happens: (i) the page hangs when I enter my username and hit "next"; (ii) the page returns an error message that says "400. That's an error. The server cannot process the request because it is malformed. It should not be retried. That's all we know."
When I try to log into another Google-based app (e.g., Google Photos), it takes me to a slightly different Google login page at accounts.google.com. When I enter my username, I receive an error that says "Couldn't sign you in. The browser you're using doesn't support JavaScript, or has JavaScript turned off. "
I have searched these forums for a solution, but the only solutions I've found to similar problems suggest turning off requestIdelCallback in Safari's Experimental Webkit Features. It is already and always has been turned off on my phone.
iPhone 12 Pro Max, iOS 14