Responsive Theme Social Icons show as "?"

I have tried all the other posts to attempt to get my icons showing again. The page in question is https://friendlyave.org. The icons should be at the bottom of the home page. The links work, but the .png icons cannot be found. The icons are stored in both the Child Theme and Responsive Theme folders: public_html/friendlyave/wp-content/themes/responsive/core/icons/facebook-icon.png AND public_html/friendlyave/wp-content/themes/responsive-full-content/icons/icons/facebook-icon.png