Facebook app not displaying on most browsers

Hi there, I have asked a question already but it takes ages to get any response... please help me asap! The Facebook app I have installed on the main page (one of the widgets) only displays for me on safari. Can you please have a look to see why this is? I have granted access to your guys to have a look on the website if they need.

I need this sorted asap as I am paying monthly for a product that I currently can't get to work.

All the best,