Playback error. Could not tune channel. Please check your tuner or antenna

Plex Media Server Desktops & Laptops
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Plex Media Server beta 1.17.0.1709 released earlier today has a fix for the space in channel identifier issue in xmltv guide

See Release Notice Plex Media Server

  • Corrects Live TV playback error when tuning to channel that contains space(s) in it.