Google forces you to hand over personal data like your phone number or alternate e-mail addresses, otherwise they'll lock you our of your account, "for your security"
"Couldn't sign you in.
You're trying yo sign in on a device that Google doesn't recognize, and we don't have enough information to verify that it's you. For your protection, you can't sign in here at the moment.
Try again later or sign in from a different device"
Oh right, and they say it's "at the moment", but actually you can retry as long after as you want, they'll NEVER change their mind about it.