Fatal error: Class 'SCStringUtilities' not found in

Sorry for the delayed response and for the issues you ran into.

I'm not sure why you encountered that fatal error. I just checked the widget.php file and it properly includes our library file, so the SCStringUtilities class should be found as expected. I'd honestly recommend re-installing JFBConnect just to make sure all the files have been properly installed, just in case. It shouldn't affect your current configuration or change anything and should just verify that everything is up-to-date.

Finally, I don't know why uninstalling Sourcerer would have caused that issue. It's not related to us. If you want to uninstall it again, I'd recommend disabling any JFBConnect plugins, which should disable all of our functionality and (hopefully) that will get you going.

I hope that everything is going smoothly now, but should you run into any other issues or have any other questions, just let me know.

Thanks,
Alex