You might try disabling reporting crashes to Plex, then restarting Plex Media Server. I’ve not seen the problem on my system, so don’t know if disabling crash reporting will help, but it will not hurt anything.
Settings → Server_Name → General → Send Crash Reports to Plex
General comment: If running Win10 (v1607 or later) or Win11, consider updating to the 64-bit version of Plex Media Server. The transcoder is more efficient, especially with Nvidia GPUs. It also supports hardware accelerated HDR to SDR tonemapping when using a Nvidia GPU.
Download the 64-bit version from plex.tv. The installer will remove the 32-bit version before installing the 64-bit version.
Plex Media Server support ending for older versions of Windows (7, 8, and 8.1), macOS (10.11, 10.12)
https://www.plex.tv/media-server-downloads/#plex-media-server
