why is login to icloud.com and discussions.apple.com failing
When I visit any Apple website and try and login, I get an Apple ID popup like this one (Apple ID blanked out):
If I click on Continue with Password, then enter my Apple ID password, it fails. Repeatedly, in new windows, after restarting Safari, changing AppleID password, rebooting, etc.
If I click on Cancel, then the Apple webpage loads a Sign In screen:
The sign in succeeds, using the same password and apple ID. What is going on here?