Ahhh! That makes sense. Yes, if Facebook can't validate the URL, it's 'scanner' will definitely think something's not right.
Glad you got it going, and thanks for let us know your solution! Should you need anything else, just let us know.
Finally, please consider leaving a rating and review on the Joomla Extension Directory for JFBConnect, or our support. It's certainly not required, but very appreciated!
extensions.joomla.org/extensions/social-...ook-integration/7215
Alex