DVR error after upgrade to latest version

Plex Media Server NAS & Devices
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I also have the same issue - selecting “Live TV & DVR” on PLEX player, I get message: “There was an unexpected error”

PLEX v1.3.1.916-1cb2c34d (on Windows 10 client)
PMS v1.18.0.1846 (on Windows 10 server)