After pressing "Send" button I get an invalid source message.

Not sure what's causing that message. I check the URL you have in the tag above, but couldn't see the Send button. Can you let me know where we can see the Send button to test further?

Thanks,
Alex

Facebook pushes out large updates to their Javascript on Tuesdays. It's possible you just found a temporary bug. Some issues also occur the first day or so when you add new social features to your site. It takes time for the networks to 'recognize' your site and know it's not a bad site for people to use.

Either way, glad it's going. Should you run into anything else, just let us know.

Finally, if you haven't already, please consider leaving a rating and review for JFBConnect, or our support, on the Joomla Extension Directory. It certainly isn't required, but is very appreciated:
extensions.joomla.org/extensions/social-...ook-integration/7215

Thanks,
Alex