I'm running PMS on Ubuntu, I've also installed UAS and YouTubeTV channel.
I can't see the Channel section in the plex menu on the old Samsung (UE32ES6727, fw ver. 002004, plex app ver. 2.007). It looks exactly like this issue.
Moreover - if I add the channel vie Channels Catalog (this menu is accessible on TV), it does not appear in the client - but I can see it (as well as WebTool and YouTubeTV) on the clients on the iPad, on my Windows PCs, newer Samsung TVs - like PS64F8500 or UE55MU6100.
Thanks in advance