Problem With Icons

Hi guys,
I’ve recently installed Foo Gallery and also Foobox image lightbox plugins but next , previous and close icons don’t show up correctly and I couldn’t find out which pack they use , font awesome or bootstrap.
also Permission to /fonts directory is set to 755 and files also.
This is my test gallery Page :
https://fa.karacoenergy.com/%da%af%d8%a7%d9%84%d8%b1%db%8c/
and wordpress main Url set to : https://fa.karacoenergy.com and I can’t change it and add “www” at first because it’s “fa” language and on a subdomain.

I would appreciate any solutions.

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