The path where local application data is stored - not showing up

Plex Media Server Desktops & Laptops
3

To provide some context:
The quote you found is outdated. This feature has been removed from the frontend due to security concerns.
From the related PMS release announcement (version 1.19.3.2831):

Plex Media Server 1.19.3.2831 is now available in the Beta update channel

FIXES:

  • (Security) Remove the Windows AppData path preference from the web app (#11355)

The post shared by nydave69 is the way to go.