(adsbygoogle = window.adsbygoogle || []).push({}); if you get the authenticating loading graphic, then the "Sorry, VUDU is not currently available. Please try again later. For more information, contact VUDU customer support at support.vudu.com". then its a very easy fix.

its telling you that you are most likely over the device limit(5). In order to add the Xbox One to your account, you'll need to remove one of the devices that was already added. then reload the app on your xbox one and it will work.