Roku (Error createDrmSession.403-102)

Hi,

I have a new customer-owned modem and router. The Internet and cable work fine. When I try to launch the The Xfinity Stream app  on my new Roku it gives me the error message: Error createDrmSession.403-102.

I've been on the phone with comcast for hours and reset, reloaded, and redone everything a million times with no luck. From what I have been reading on the forums, many other people have had this issue, as well.  It looks like there is a back-end database issue or something with the modem. Help??