Apple TV app not allowing any login

I recently got new cable boxes and when I try to log into the Apple TV app, no QR code shows (just the 7 day trial option) so when I use the menu to try and sign in it says something like it is not available.  I can "Try again" but it is an endless loop.  One of my boxes eventually (random as far as I can tell) showed a QR code on the landing page so I got in on that box, but I have not been so lucky on the other (I have one more box to go which I have not even tried yet).  I have "reset" the app multiple times and rebooted the box multiple times.  All the other apps are fine.

I tried to see if I could circumvent by selecting the 7 day trial, but it actually did not work either - got the same endless loop where it was not available.  The message I get on both says something about internet connectivity, but of course this is through the cable box and my Wi-Fi is fine and all the other apps are working.

What can I do?