I'm sorry to hear about this issue, we've not got a ticket raised for this issue at the moment and so would like to test your individual box.
I've located your account using your Community details to take a look and we're not detecting any errors. Can you talk us through how you've got your TiVo box connected to the network? Are you using any other apps too? If so, are they working well?
Lastly, are you watching any On Demand or Catch Up content? Are they working at the moment?
We're having the same problem. Can't raise a ticket because I work during the hours that the line is open. I've seen that there is a fault reported on apps such as iPlayer, and the fix date seems to be pushed back every day.