I was able to finally get the TV added. I’m still seeing some other issues, but I’ll hold off on commenting until I do further testing.

I was going to ask the same question. I have a TCL/Roku Tv and I’d like to setup a activity to view Sling TV. I have the Sling button on the original remote. I go through the process to add a button. It tells me to point the remote 3-5” from the hub. I’ve tried it 4-5 times and wait 5-10 mins. The app just spins and nothing happens. Very frustrating.