Welcome to our forum.
Thanks for the reported issue,
Recently we found the problem, some users still using old versions of font-awesome when our latest version of font-awesome loaded it will cause the problem, that’s why we have removed font-awesome to load from our plugin.
you could load font-awesome file from your theme by adding following line on functions.php file
wp_enqueue_style( 'font-awesome-5', '//use.fontawesome.com/releases/v5.2.0/css/all.css');
Let me know the result.