Google insights font-display

I have a question on google insight and is there a plugin or is it a coding issue will show you what they state:

Leverage the font-display CSS feature to ensure text is user-visible while webfonts are loading.

Ensure text remains visible during webfont load:

Warnings:

Lighthouse was unable to automatically check the font-display value for the following URL: https://newslink7.com/wp-content/themes/mh-magazine/fonts/fontawesome-webfont.woff2.

Lighthouse was unable to automatically check the font-display value for the following URL: https://newslink7.com/.