The JFBCFan module hasn't been included with JFBConnect for almost 2 years now. We still supported sites that were using it, but we had to make some changes that broke it in the latest release.
Please replace the JFBCFan module with the SCSocialWidget configured as Facebook -> Page Plugin. It should render the exact same thing. The SCSocialWidget has been the new module to configure all of the different social widgets from a similar interface.
I hope that helps get you going, but if you still have issues, just let me know.
Thanks,
Alex