Sorry for the multiple posts - I noticed this error in the logs
Feb 16, 2024 11:00:26.838 [0x288c03000] ERROR - Couldn't find the file to stream: /Applications/Plex Media Server.app/Contents/Resources/Plug-ins-c29d4c0c8/WebClient.bundle/Contents/Resources/js/chunk-8111-4eb8b68a0c1733a64313-plex-4.116.1.34633-acaef50.js
This happened because you had an old Plex Web session from before you upgraded to 1.40.0 - as we changed the Plex Web bundle in this version - this file was no longer present
So please exit all plex web browser sessions and start a fresh one after 1.40.0 upgrade and see if that gives different outcomes
When the bundled Plex Web version changes in Plex Media Server, need to ensure a fresh browser session is started
If the issue was to do with using an old browser session, then no need to go through the tests for machine name change