Peacock premium offer cannot be activated, keep getting "something went wrong" from this domain: https://bpe.fortumo.eu/

I am a Gigabit Pro customer, experiencing the issue where I am unable to activate my included Peacock Premium plan.  I follow the directions here: xfinity.com/activate-peacock, but after clicking Activate Peacock and signing in, I eventually get directed to a site with the URL https://bp.fortumo.eu/error/ which displays this message:

Something went wrong

Sorry, there was an error.

Please, try again later.

This happens every time I try, regardless of if on my home Wifi, ethernet, or a mobile connection, and regardless of browser.  How do I get my Peacock Premium plan activated?