Uverse related apps

The uverse app and any app associated with my u200 channels will not run on any of my iOS devices. The error message says I am not allowed to view this content. I have tried multiple chats with ATT reps and all they will tell me is it’s an app issue. No it is a uverse issue. The apps are not recognizing my uverse subscription. Someone on the forum suggested that my subscription package needs to be reactivated or reauthorized on my gateway but no one at ATT has suggested that or have been able to provide a solution.