I've removed and reinstalled the channel to see if that would resolve it. But still the same issue. Not showing in my installed channels list via the web console or my other plex agents. If I browse channels to download I can see the Tested channel and can remove it and reinstall. If I choose browse I get a message "this channel is not responding".
Anyone know if there's a problem with that channel at the moment or has it got corrupted on my plex server somehow?