Icon on Enfold template stops showing

Hi,

The icon on the default theme stop showing. Not the icons within the editor but the icons on the theme template.

Example:
1. down arrow which when click user will be brought to the next section.
2. left & right arrow of slider are not showing.
3. icon on the mobile navigation box is also not showing.

all of them shows a box instead of the icon.

medicdeno4u.com

(Side Note)
I can't select the Theme Support Option because the Select Theme Option within it do not have anything. I can't select anything and I can't submit this request.