I run an older box that comes up with the iCloud panel, asking for a 2-factor ID verification. I can't get past it.
It's asking me for my password followed by the ID that's sent to my iPhone. It repeats itself and I can't get past it.
This question is not a duplicate. If you look at the image, which seems to be difficult for some people, it says right there, to enter the password followed by verification code. It doesn't indicate where to enter this. Entering it with that dialog box open, does nothing. It does not state to use the password field specifically. Apple should know better.