QNAP TS-451+ This Site Cannot Be Reached

Plex Media Server NAS & Devices
1

Server Version#: QNAP TS-451+
Player Version#: 1.42.1

I’ve been using PMS on a QNAP TS-451+ for 5 years and have multiple devices with PlexPass that I use to watch movies stored on QNAP. Recently, went to watch a movie on my tv and my library wasn’t available any longer. The library is no longer available on any device.

I updated PMS on QNAP to most recent version but I’m still getting an error message stating “This site can’t be reached 192.168.0.5 refused to connect.” I have searched online and tried various troubleshooting suggestions but nothing works.

I updated PMS. I checked and PMS is running. I uninstalled and reinstalled it. No proxy or firewall issues. I restarted the QNAP.

Any ideas on how to fix would be appreciated because I’m at my wits end.

2

Look in Resource Monitor to confirm it’s running. App Center can say it’s running when it’s crashed / didn’t start

Screenshot from 2025-08-26 00-43-52
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If you can confirm it’s running but it’s not accessible on port 32400,

  1. Restart PMS and try it again. You should always get a reply if it’s running
    http://lan,.ip.of.qnap:32400/web

  2. If you now do get a reply (empty Plex/web browser page) but no server, then it’s likely become unclaimed.

This shell script will resolve it.

  1. Download the script, put in /share/Public
  2. SSH (or putty) into the NAS
  3. sudo bash to gain elevated privileges
  4. Reclaim it using the script.

The README file shows example on QNAP.

3

Thanks a lot @ChuckPa !

I have the same issue - got Plex Media Server running on QNAP TS-464, Firmware QTS 5.2.6.3195, and can see in the AppCentre that it is running (should be, because I reinstalled Plex Media Server on the QNAP, and Plex itself on the devices I’m using, and rebooted every single device) :

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However, following your tip to check the resource monitor made me realise that it is not actually running:

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I’ll try and find out how Schroeder’s Media Server can both run and not run a the same time, but if you (or someone else) has any tips, I’d be very grateful.

Wishing you all a good Sunday from Zurich, Switzerland,

Paul

P.S. The Resource Monitor overview shows plenty of memory / CPU left:

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1 Like
4

Thank you!

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