Windows: Local Plex Web App times out or never loads

Symptoms

In a working install/computer, you'll be able to access the "local" Plex Web App that comes with your Plex Media Server. That's done through http://localhost:32400/web or http://127.0.0.1:32400/web on the local computer or via a LAN IP such as http://192.168.1.57:32400/web from the local network.

Related Page: Opening Plex Web App

In rare cases, when trying to load the local Plex Web App, you may see:

  • perpetual loading
  • a timeout

Causes

In some cases after a user runs a "TCP Optimizer" program, settings can be changed in Windows that affect access to the loopback address and can cause the symptoms mentioned above.

To see if this affects you and to resolve it:

  1. Open the Command Prompt as an Administrator
  2. Run the command:
    netsh interface tcp show global
  3. Look for the "Auto-Tuning" value and see if it's set to experimental
  4. If it is, run the command:
    netsh int tcp set global autotuninglevel=normal
  5. Reboot Windows

Related Page: Netsh commands for Interface Transmission Control Protocol
Related Page: Start a Command Prompt as an Administrator