I set up a website http://www.howpedia.de with the framework http://www.question2answer.org/ there is an integrated Facebook login that does not work for me or a fried of mine (so the error is not on my site).
If i click on signup with facebook, the popup for login shows up, asking for permission and closes itself again. But i am not logged in on my site. If i reclick on the login, the popup opens and closes itself with no error or what so ever.
Since i am using an already integrated facebook login plugin from the framework and the thing is working on the official Q&A Site http://www.question2answer.org/qa/ i have no clue what to do.
Steps so far:
I also tried to register another APP to try it with different public / private key, but the result is the same.