Playback Error: This live TV session has ended

Thanks. Yes, indeed, the Playback Error is gone now with “Use alternate streaming protocol for video playback” enabled. A nice side-effect of having alternate streaming enable is that it resolves the audio stream issue I described in https://forums.plex.tv/t/ongoing-bug-plex-web-4-50-1-thru-v4-62-1-audio-stream-bug-now-fixed-in-v4-64-3/680752.