Welcome to the Community Forum, I'm sorry that your TV Anywhere isn't working and that you are getting the Device Registration issue.
We recently had an issue on the server that our technicians have now cleared.
Checking this for you, I can see a problem on your account that is preventing your registration for TV Anywhere still.
I have escalated this to our I.T. department to resolve. As soon as I have an update on this, I will be back in touch with you.
Apologies for the inconvenience this causes.
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I've received notification that your TV Anywhere has been tested and it's working now. Please let me know if you have any further problems with this.