Plex constantly crashing

Plex is installed locally on Ubuntu 20.0.4 (non-docker); i7-6700k, 16GB RAM, 1TB SSD.

Plex has been working fine for the past month or so but now crashes constantly. I can’t think of any major configuration changes to the system or Plex. It looked like it may have been related to generating chapter thumbnails for 4k HEVC/HDR media (as that was what was showing up as the current task when it was crashing) but even after disabling thumbnail generation, it’s still crashing. Logs attached.

Server Version#: 1.24.4.5081
Player Version#: 4.68.0
Plex Media Server Logs_2021-10-27_05-12-18.zip (2.9 MB)

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