This is a setting in your Facebook application that must be enabled before we can access it via Autotune.
Go into your app on
developers.facebook.com/ and navigate to Settings > Advanced. If you scroll down on that page, there's an option called "Allow API Access to App Settings" that needs to be enabled to resolve this error. Once it's on, you'll be able to use Autotune in JFBConnect to set up the application.
-Melissa