When you click on the facebook login button it reads:
is this a problem with FB? It is happening on the question2.asnwer.org/qa site.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask here, in English.
To report a bug, please create a new issue on Github or ask a question here with the bug tag.
If you just want to try Q2A, please use the demo site.