Tv app doesnt recognize app

Very frustrating when you are on your home wi-if and the app says you can only watch when connected to wi-if. I am connected to wi-if !!!!! I re-start my phone and it will run for a few minutes and then give the same message. Urg! Why have the app if it doesnt function.

Cshultz about Xfinity Stream, v3.5.0