I\'m trying to work my way through the Facebook tutorial publish and open graph story for iOS, https://developers.facebook.com/docs/tutorials/ios-sdk-tutorial/publish-open-graph
this error means that your Facebook page setting is not set to visible.
Go to Facebook general setting and check page visibility.
{ "error": { "message": "Unsupported post request.", "type": "GraphMethodException", "code": 100 } }