First, can you try to save the module? That will attempt to repopulate the list. Any change?
If not,
* Is this a new instance of the module or are you editing an existing one? If an existing one, does the same behavior happen on a new one?
* Can you turn on Joomla's Error Reporting to Development and see if there are any errors displayed in the module
* What version of JFBConnect, Joomla and PHP are you running?
We haven't been seeing this with the latest version from anyone else, so we'll definitely need more information from you.
-Melissa