background shows, icon does not

I’ve set up a homepage in a test site: https://test.adunate.com/ and the social media icons work perfectly. I’ve done the same thing in my customer’s live site and they do not. The background shows, however the icons do not. [ redundant link removed ]

• This topic was modified 2 years, 7 months ago by Steven Stern (sterndata).
• This topic was modified 2 years, 7 months ago by Jan Dembowski.

The page I need help with: [log in to see the link]