I'm attempting to create a new Apple ID with a new @icloud.com
email address from a new Mac user account.
I enter the required information, including a new unique iCloud email address. Attempting to use an already-used iCloud address gives a different error on a previous screen.
I also enter a phone number and receive a 2-factor code from Apple. I then agree to the terms of use.
However it then gives the error:
There was a problem creating your new Apple ID.
Your account cannot be created at this time.
What is the problem? Why can't I create an Apple ID?
This is a new Mac (provided by work), so I am 99% sure I am not hitting the per-device Apple ID limit.