We'd really appreciate and be thankful if you leave a good review on the plugin page. This is the best way to say thank you to this project and support team.

Rgds

Wesley.

Use the CSS code below:

#wpdcom .fa, #wpdcom .far, #wpdcom .fas {
   font-family: "Font Awesome 5 Free";
   font-weight:900;
}

Put the code in the Top Admin Bar > Customize > Additional CSS > "Additional CSS" textarea, save it, delete all caches and check again.

 Please don't forget to press Ctrl+F5 (twice) on the frontend before checking.

Here is the sample URL: https://tradingtoolser.com/en/daily-briefing-of-financial-markets-2020-12-11/

This is just a small CSS conflict the active theme or other plugins. Please leave some example URL to allow us to debug the issue and provide some CSS solution for you. 

I have no comments icon. There is only a small rectangle instead.

How to fix it?

See the print screen.