Troubleshoot adding media libraries to new Plex Server install

Plex Players
1

Server Version#: 1.40.4.8679
Player Version#: 4.132.2

TL/DR
Old server had a hardware failure and died. RIP server.
Fresh Ubuntu server 24.04 (Noble) install
OptiPlex 3040, Core 5, 8GB DDR3, 256GB SSD

Problem:
After fresh Plex Server install, I tried to add my media libraries.
Settings → Libraries → Add Library → “Select your library type” → “Browse For Media Folder”
That appears to work and triggers library refresh visible on the dashboard.
When that completes, the newly added folder is not available.

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Also, these supposedly added libraries do not show up when I navigate back to Settings → Libraries, so there’s no way to update or remove them from the UI.

Any help is appreciated.

Cheers,
HEX

2
  1. Open https://app.plex.tv/desktop/#!/settings/devices/pms
  2. Change the “ALL” to “Server” (dropdown)
  3. Find the old server which is now gone
  4. REMOVE :x: it
  5. Go back to the Plex/web app page and
  6. Control+F5 key in your browser to reload your servers from Plex.tv
    – The old server will be gone
  7. Now you can open the new server by either http://127.0.0.1:32400/web (if you’re on the new machine)
    – or http://lan.ip.of.server:32400/web
  8. You should now be able to claim it.

let me know if you don’t get it

3

Hello,
Thank you for your response. That worked brilliantly.
I removed all servers, then claimed the new one ad removed/re-added the library.

However, I am now facing a different issue. All files are returning the same error when I attempt to play them:

Playback Error
An error occurred trying to play “”.
Error code: s1001 (Network)

My guess this has to do with the file permissions in the media folder. I even went ahead and ran ‘chmod 777’ for a few of them, which I know is usually not the best idea.

What should I look for to resolve this?
My Plex is on Ubuntu 24.04 LTS and all media is on NAS share NFS mount.

Thanks in advance.

4

Hi again,
I think I figured out the network error. Had to do with the NFS mount, rather than individual file permissions. Adding ‘nfsvers=3’ option to /etc/fstab fixed this. I am now able to stream media to my HTPCs and smart devices.

5

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