Xfinity Stream app will not activate on new Samsung TV

I just purchased a Samsung TV from Costco. The Stream app will not initialize. I go through the whole init process and activate it from my Xfinity app on my smart phone, and it says the TV has been activated but the TV app just sits there. I've tried many times and the TV app never refreshes and never works.

I've had no issues with all the other streaming app on the TV, just Xfinity Stream.

With a new TV, I think it should work.