forwarded domain does not show social icons

Hi! I love the theme, but I am having a strange issue with the social icons. On my primary page https://www.philipdeangeloart.com, everything looks the way it is supposed to.

However, I have a second domain name phildeangeloart.com, which forwards to this page and when you go to that one, all the social icons just show up as little boxes.

I asked my webhosting company/domain manager about this and they said it is a theme issue…so here I am. Can you help?