Unable to login to Apple TV+ app

I am currently unable to login to the 3rd party Apple TV+ app through my X1 box. I have tried reseting my router, reseting the box, and refreshing the system. It has worked for years, but recently, when I attempt to open the app, I am presented with the "sign in or sign up screen". When I click 'ok', it attempts to take me to the screen with the QR code, but is stopped and the following error message come up "connection not available". "there were errors completing your action. wait a moment, then try again." When I click ok from here, the same error message just continues to pop up. Any ideas what is happening or suggestions how to fix? Thanks