Ruphus: I fixed this at my inlaws house by having them open the Netfix app on their phone while connected to wireless network.
https://help.netflix.com/en/node/24853
Edit: fixed link
You have to do this regularly. We were ensuring we opened the phone app and the TV app each week at both residences. Then we went away for two weeks and that was all she wrote.
Based on our experience once you get the dreaded message, opening the phone app doesn't help. There is no going back.


