Ok, here goes, go to studio > FB connect > settings and this is how i have it set up, look at pic..

Click on config > then the link make FB app > when prompted to the app > add new app > once you add the app > click on the left settings > basic > where it says display name enter the name of your site without the .com > then app domain enter the name of your site without http or https but do add the .com at the end > contact email, your email > Privacy Policy URL enter the url of your privacy > scroll down and on website enter the url of your site > click on the left under products FB login then settings, enter the Valid OAuth Redirect URIs  that it says in the Redirect URI under config on your FB connect app > then save changes. Go back to the settings under dashboard and chose basic again, copy the ID and secret key to your site. Goodluck!