Why is Server Configuration in Pgadmin3 inaccessible for me?

My Postgres server is running (localhost:5432), but Tools > Server Configuration is greyed out for me as below. I was attempting to access it to edit/locate my postgres.conf file.

adminpack extension

You need to install the adminpack extension on the server.

CREATE EXTENSION IF NOT EXISTS adminpack


Tips:

• Verify the extension is available for installation.

SELECT * FROM pg_available_extensions ORDER BY "name" ;

• Verify installation.

SELECT * FROM pg_extension ORDER BY extname ;

StackExchange Database Administrators Q#139642, answer score: 5