Facebook Developer App Bug

Hi,
I set the Facebook app the last days with which user can registratate with facebook and it seems like it would work, but I tested it with a facebook account and now it says, after I clicked ‘okay’ at the permissons request: “Please click again to login with facebook and allow the application to use your email address”
When I click again, it just says the same all over again. Has anyone an idea what that could be? I’m glad about every bit of help!
Thanks