JBF Invite is not working

Have you fully configured the JFBCRequest module with the ID of the request and all other information from the parameters? If the button isn't showing, that's a sign that something isn't configured right. The full Facebook Requests for Joomla guide should help take you through it all, but if you have any other questions, let us know.

If you do need more help, let us know the URL where we can see the Request module configured and we can help investigate further.

Thanks,
Alex