Yes, you are looking in the wrong spot.
You should be in the Community Builder component configuration itself, not JFBConnect. In there, go to the Field Manager, and make sure that no fields in there are set to required that (in JFBConnect) aren't being mapped too. In there, you should see the whole list of different fields that a user's profile has (some in their profile, some hidden, and other types of fields). These fields can't be marked as required, for now, if they aren't being imported into from Facebook because CB won't let us save the user to the database if they're marked that way.
Hope that all makes sense, but if not, we'll send some pictures that should make it more clear. Best wishes!