vimeo icon not showing in fairy social menu (button there)

Greetings! Working on getting an astronomy club website migrated using the Fairy theme – which is great so far. The one problem I’m having is the lack of a vimeo icon in the social menu (facebook and youtube work, twitter works but not set up yet) – the button is there to click but the font and background color are not appearing. There isn’t any mention of vimeo in the key .css files and adding lines for them does not help. Hoping it’s a simple addition to a php file and asking here will spare the next vimeo-er. Thank you!

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