Evolve Icons Missing

The social icons, slider direction arrows, and go to top icon appear to be missing, specifically for these classes:

t4p-icon-social-facebook
t4p-icon-social-envelope-o
t4p-icon-social-rss
left carousel-control
right carousel-control
backtotop
arrow back
arrow forward

I re-installed the latest version of Evolve, but still have blank placekeepers for images on the web site.

I don’t know if some image files are missing, or a php is damaged. When inspecting the element, the “content:” still points to a resource, but no image.