Get errors when trying to add YouTubeTV

I am trying to add my YouTubeTV account to Channels DVR. I keep getting a message, "Context Canceled. SC 400". The account credentials do work. I just can't get them to work, here.

Does anyone know a fix for this?

Thanks so much!

Matthew

Try rebooting your shield

I tried that. Unfortunately, that error keeps coming up.

I just found on a forum that YouTube TV login on an Nvidia Shield is not supported. Does anyone know when it might be?