In addition to the JFBConnect component, the following all use the component and should be removed too.
* Plugins: anything in 'socialprofiles' and 'opengraph' groups, jfbconnectauth, jfbccontent, jfbcsystem, jfbconnectuser
* Library: "SourceCoast Extensions Library"
* Modules: SCLogin, SCSocialWidget, SCSocialStream, SCSocialFindUs, JFBCSocialShare
The error is right underneath the breadcrumbs
This probably means you have an instance of one of the above modules still installed and enabled.
Hope this helps but let me know if you still continue to have the problem after removing the above.
-Melissa