Registration not working with JFBConnect with Joomsocial

Can you let me know:
* What version of Joomla you are using? You mention 2.5, but I'd like to know the specific release (2.5.xx).
* What version of JomSocial are you using?
* What version of JFBConnect are you using?

I've never seen that error before, but with that, we should be able to help investigate further.

Finally, also please post from the account you subscribed to JFBConnect from. Posting from your subscribed account also helps us see your Autotune history, which helps us see what errors may be happening on your site.

Thanks,
Alex