Galaxy S7: Watch espn won't load At&t login screen - DirecTV

It just hangs trying to load login screen, says "please wait while we send you to your provider" (Uverse). This does not occur on my old S4 or iPad. It seems either S7 hardware or 6.0.1 marshmallow software is incompatible with some sort of platform being used. Have talked to ESPN, At&t, and Samsung support. None can figure it out. Have un/reinstalled, cleared phone cache, etc. The app will load any other carrier such as Verizon or Cox. But at&t uverse, and interestingly Direct TV will not load to login screen. Seems to be an at&t issue with their platform

This question, "Galaxy S7: Watch espn won't load At&t login screen," is about DirecTV channels, programming, equipment, and sports.