Max app

Since I updated the Max app on my phone, it tells me I have to connect through my service provider. I select Xfinity and it says I'm automatically logged in and allowed to watch Max. It sends me back to Max, but when I select something to watch, it kicks me back to the "must login through provider" page. I'm stuck in this loop and can't use my Max app. I have uninstalled/reinstalled, cleared the cache, restarted my phone, etc. If I can't figure it out I will have to cancel Max on Xfinity and pay for it through Amazon or Disney.