Netflix no longer streaming

I too am no longer able to stream Netflix, although all other streaming services (Amazon Prime, Hulu, YouTube, Pandora) work fine as usual.

I have the cylindrical Nokia gateway and am watching on a Sharp 50" smart Tv LC50-LBU591U. I've had T-Mobile Home Internet since last Spring, and it's worked fine since then, until this issue which began a few days ago.

I've got a number of other devices, including Google Nest Hub, Nest Audio speakers, Nest Camera with Floodlight, and several Kasa smart switches and plugs. The most recent Kasa smart plugs would not connect to the T-Mobile dual band (2.4 and 5 Ghz) network, so I created another single band 2.4 Ghz network channel just for those plugs, but kept everything else connected to my original dual-band network, since it seemed to be working fine. 

Sometime since then I lost Netflix, but everything else still works. Not sure if adding the single-band channel has anything to do with the problem, since the TV is still connected to the original dual-band channel, and still works on all the other streaming services.