Registration on multisite with ultimate facebook

Hi we are having som trouble with the registration on multisite with ultimate facebook.

The app is setup on facebook and buttons are showing on the registration page.
when you log in to facebook it fills out the form and when you later click on register
i get a facebook message where it says "something went wrong we are working on fixing it as soon as we can"

have i missed filling something out?
url to registration: http://spotlife.se/wp-signup.php