Facebook Features Stopped Working

On load, your site has an error on the console that needs to be resolved:
k2.frontend.js?v2.7.1&sitepath=/:9 Uncaught ReferenceError: jQuery is not defined

Please check to see if you've recently changed any settings in your backend for how jquery is handled. I know that K2 has parameters for JQueryHandling. From the error message, I'd start with those first.

-Melissa