Can't add library to fresh install. Plex can't identify agents

Server Version#: plexmediaserver-1.31.1.6733-bc0674160.x86_64
Player Version#: Version 4.100.1

On a fresh install of EL8, with a fresh install of Plex Media Server (both the current plex pass version as well as the public one above), I experienced immense difficulty just getting the server to stop looping through the setup, but am still unable to get plex to add any libraries. I have tried in the Windows app, the browser app, as well as the local browser app.

On the client side, the console logs:

481-481-5f393fa408d672dda346-plex-4.100.1.29405-21e8735.js:2 No type was found for undefined

POST http://127.0.0.1:32400/library/sections?name=Movies&type=movie&agent=tv.plex.agents.movie&scanner=Plex%20Movie&language=en-US&importFromiTunes=&enableAutoPhotoTags=&location=%2Fvar%2Fmedia%2Fmovies&prefs%5Bcountry%5D=CA&prefs%5BuseLocalAssets%5D=0&prefs%5BuseRedbandTrailers%5D=1&X-Plex-Product=Plex%20Web&X-Plex-Version=4.100.1&X-Plex-Client-Identifier=zzzzzzzzz&X-Plex-Platform=Chrome&X-Plex-Platform-Version=110.0&X-Plex-Features=external-media%2Cindirect-media%2Chub-style-list&X-Plex-Model=bundled&X-Plex-Device=Windows&X-Plex-Device-Name=Chrome&X-Plex-Device-Screen-Resolution=1536x664%2C1536x864&X-Plex-Token=zzzzzzzzzzzzzz&X-Plex-Language=en 400 (Bad Request)

And on the server side:

Feb 28, 2023 11:59:53.226 [0x7f669c4feb38] INFO - Request: [127.0.0.1:47164 (Loopback)] POST /library/sections?name=Movies&type=movie&agent=tv.plex.agents.movie&scanner=Plex%20Movie&language=en-US&importFromiTunes=&enableAutoPhotoTags=&location=%2Fvar%2Fmedia%2Fmovies&prefs%5Bcountry%5D=CA&prefs%5BuseLocalAssets%5D=0&prefs%5BuseRedbandTrailers%5D=1 (4 live) #240 GZIP Signed-in Token (roo.h.taylor) (Chrome)
Feb 28, 2023 11:59:53.226 [0x7f669c4feb38] ERROR - [Req#240] Library: Couldn't create section: 'agent' is missing or invalid
Feb 28, 2023 11:59:53.226 [0x7f669c4feb38] ERROR - [Req#240] Library: Couldn't create section: 'language' is invalid
Feb 28, 2023 11:59:53.226 [0x7f669c4feb38] ERROR - [Req#240] Library: Couldn't create section: new scanner needs to be paired with new agent
Feb 28, 2023 11:59:53.226 [0x7f66a26aab38] INFO - Completed: [127.0.0.1:47164] 400 POST /library/sections?name=Movies&type=movie&agent=tv.plex.agents.movie&scanner=Plex%20Movie&language=en-US&importFromiTunes=&enableAutoPhotoTags=&location=%2Fvar%2Fmedia%2Fmovies&prefs%5Bcountry%5D=CA&prefs%5BuseLocalAssets%5D=0&prefs%5BuseRedbandTrailers%5D=1 (4 live) #240 GZIP 0ms 503 bytes (pipelined: 2)

Anyone have thoughts on a solution to this, or a way to downgrade my plex installation to one that’s functional?

After claiming a new server, stop the server, and then restart it.
Refresh the web app in the browser and try again.

1 Like

Le sigh…

It hurts me, how long I struggled with that, and how stupidly simple that solution was.

Thank you.

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