I have absolutely no clue. There is nothing in JFBConnect that tries to integrate with, or load files from, Ajax Quiz. The error that shows up there is something we would present if there was an issue with JFBConnect. All I can guess, though, is that Ajax Quiz copied a file from our extension and included it in their product without renaming the error message.
My best suggestions are:
* Re-install the latest release of JFBConnect. That will re-install all our files in case one of them was edited by another user or modified by another extension.
* Ensure you've disabled any AjaxQuiz plugins or modules which may be throwing that error with our message
* Contact the AjaxQuiz developers to see if they are aware of any integration they have with JFBConnect or files they may be using from our extensions.
I hope that helps get you started, and please let us know the resolution. We're curious as to what's happening.
Thanks,
Alex