icons are not showing on front and backend of Elementor Plugin

Recently I updated below code in elementor plugin files. After updating, icons are not showing on the front and backend of the Elementor plugin.

I updated because the Google page speed test recommends this code to speed up the website.

The code is here
@font-face {font-display:swap}

• This topic was modified 4 years, 6 months ago by itsprabhucbe.
• This topic was modified 4 years, 6 months ago by itsprabhucbe.
• This topic was modified 4 years, 6 months ago by itsprabhucbe.

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