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
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:
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:
Open the Command Prompt as an Administrator
Run the command:
netsh interface tcp show global
Look for the “Auto-Tuning” value and see if it’s set to experimental
If it is, run the command:
netsh int tcp set global autotuninglevel=normal
Related Page: Netsh commands for Interface Transmission Control Protocol
Related Page: Start a Command Prompt as an Administrator