I've been having this problem for a couple of weeks. Running Channels DVR on Raspberry Pi with YouTube TV as my provider. CBS Sports Network on channel 6196 is no longer available ("401 Unauthorized" message). And although CBS on channel 6003 appears to authenticate successfully, whenever I try to tune to this TVE channel my tuner ends up tuning to channel 2.1 on my HDHOMERUN (channel 2.1 is the WCBS channel in NYC). Basically, I have lost access to channels 6003 and 6196.
I have a feeling CBS broke this on their end. It was working with youtube tv. Then it stopped. Then it started working again. So then I changed my account over to a non-recoverable one and then I lost the channel totally after that. Just wouldn't authenticate. Not sure what they are doing. I don't think they do either.
I'm having the same issue now in the Washington DC metro on YouTubeTV. CBS not coming up in the channel search. I deleted the TVE source, logged in again, same issue. Logged in via the web, screen says YTTV not participating in my location, same as the screen shot earlier in this thread. Did anyone resolve?
Then you cannot get CBS on TVE. It is a contract situation between your local CBS and the Cable/OTT provider. You need to contact your local CBS affiliate to resolve this, but no promises that they will do anything.
I went round and round with NBC support folks and youtube TV. Basically the same issue you had 7rdr7. They didn't have a contract with the local station. But all the other stations they own I could connect to via their live website. Just not the local one. Ended up going with another provider which happens to have all 4 of my local stations. So that tells you how right babs is on this.