Channel Apps Not Recognizing My Subscription - DirecTV

I have the 450 package with all the premium channels. I am trying to use HBO Go, the Comedy Central app, Showtime Anytime, Starz Play, TCM, etc. When I try to login with my U-verse credentials they all say "Your subscription does not include this channel. Contact your provider to add it." What's the problem?

This question, "Channel Apps Not Recognizing My Subscription," is about DirecTV channels, programming, equipment, and sports.