I got you, u have a modified cocos2d-x engine.
Let’s ask @slackmoehrle about the page http://blog.cocos2d-x.org/2016/02/setting-up-facebook-app-for-sdkbox-services/
For some reason the link is this: http://blog.cocos2d-x.org/2016/07/setting-up-facebook-app-for-sdkbox-services/