Why is my Plex server settings unavailable?

That’s because you’re not yet signed in on the Plex Media Server and you’re using the hosted Plex Web App.

How do I turn on Plex Media Shield Server?

Enabling or Disabling Plex Media Server

• Open the regular Plex app.
• Go to Settings > Plex Media Server.
• The first item in row list the server version number shows if it is running or stopped.
• Select that item then toggle off or on.