Finding my Facebook friends
I've seen a few posts about inviting people who are your Facebook friends, but I try it, I see only 33 people (I not that anti-social; I have far more friends than that). Of those, there are only two are not currently Duolingo users.
It's fine for figuring out who's on here, not so good for the friends I want to invite to the Esperanto course.
What's going wrong?