Not seeing any data on my facebook insight

Hello,
When I go to the insight page of my facebook developer page for my app, I’m not seeing any insight on my visitors coming from facebook.

website is http://www.stateofwanderlust.com

can you tell me why? Especially when I’m seeing that my posts are being shared on fb

THanksa

https://wordpress.org/plugins/wp-social-seo-booster/