Suggestion: Before falling back, try to find out why Plex is crashing.
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Make sure the Plex server is set for debug, not verbose, logging.
Settings → Server_Name → General
Check the box forEnable Plex Media Server debug logging
.
Uncheck the box forEnable Plex Media Server verbose logging
.
Save Changes
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After next crash, restart Plex Media Server
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Wait 5 minutes for Plex to start and stabilize
(important to capture startup sequence after crash) -
Download log files and post entire ZIP file to the thread
Settings → Troubleshooting → Download Logs
You can fall back by installing the older version of Plex Media Server. Do not go back further than 1.25.4.5487 due to database changes.