Trying to activate addons (Netflix, Apple TV) but "Looks like we got our wires crossed"

I was a Netflix basic-level subscriber for many years. When I switched my mobile provider to T-mobile 18 months ago, I singed up for the free basic Netflix. This worked fine on all of my devces until the recent change to Netflix with ads. I can still see Netflix (with ads) on my laptop and display, but it doesn't work on my Apple TV (4th generation). This seems to be a common problem. When I looked at the AppleTV system page, Netflix doesn't appear among the purchased apps, so I'm guessing there must be some sort of handshake between T-0Mobile and Netflix, mediated by Apple. Specifically, my AppleID is no longer associated with the Netflix app on the AppleTV. Any thoughts or suggestions?