Having Apple Support call me seemed to fix it for me. I could only not get in on my ROKU TV AppleTV app. It would start the selected program but once the initial add finished I got a playback error message. Tried deleting and readding the app and then I got error trying to login (again only on the ROKU TV), so I set up a support call and when they called, everything worked perfectly, was able to login and watch a show. Still no idea what happened, guess knowing they were going to call fixed the issue.