Contour app on in-home wifi says connect to in-home wifi to watch non-TV Go channels

Contour app on in-home wifi says connect to in-home wifi to watch non-TV Go channels.

I see that users have had this problem as far back as 6 years ago.

I've had this setup working for years. Nothing has changed. IPs are the same, so it is definitely on my in-home wifi.

I've restarted, rebooted, reinstalled, reconnected and rewhatevered the bejesus out of this thing. Any other ideas? Please, Cox, just shoot me.