History of events:
I proceed through the authentication process, and last night it directed me to a blank screen. Today I proceed through the authorization status and it gives me the aforementioned error message. Streaming works on mobile platform, but not on desktop.
I am using a Win7 64-Bit desktop PC running latest versions of Chrome, Firefox, and Adobe Flash (Clean installs performed). I have updated video drivers, I have cookies enabled and recently cleared, and I am not using an adblocker.
Historically I have been using the USA Network streaming application available from their website -- This is the function that is not working. I am still able to stream USA programming through xfinity stream web application with drastically reduced quality.