Icons Not working

I purchased the Pro version of MiniMax and the addon widgets packet. Only when I go to add anything with an Icon, none of the Icons display. I just get a darker color square around an inner white square no matter what icon I try to display. On some things like the Buttons I can disable the icons, but on others like the Flipping Boxes I can’t.

Is there some hidden addon I need to upload that was not made apparent that will add the icon images into the theme / website?

Here is a view of the page that is most apparently having issues:
http://www.sa4cphoto.com/about-us/recomended-vendors/

https://wordpress.org/plugins/page-layout-builder/