Prosite Setup Page is now broken for customers

Something's happened with the latest update. Now when a customer goes to turn on their prosite - the page doesn't display the full setup form.

I've attached a screenshot of what they see. I'm seeing that on Chrome, Firefox and Safari. As a result they can't sign up. I've opened up support access as well.

The site in question for this is here : http://coachsites.me/pro-coaching-site/?bid=23