Cannot Find the Shared Pluging

The Share button is only enabled by using the {} tag, as explained on the page below. You must have the JFBCSocial plugin installed and enabled.
www.sourcecoast.com/extensions/jfbconnec...ation-guide?start=11

In the future, we will likely be disabling support of the Share button, as Facebook is no longer recommending using it. Additionally, there is a bug within Facebook's libraries (that we cannot fix) that can cause the Share button to make other buttons (Like, Login With Facebook, etc) dissappear on your site. For this reason, we're recommending the Like button going forward. We'll also be adding recommended features from Facebook to make the Like button more Share-like as well:
www.sourcecoast.com/extensions/jfbconnec...tions#share-conflict

Hope this helps!