functions.php

<?php

// Add the following to your (child) theme's functions.php file

add_action( 'wp_head', function() {
?>
<script>
(function($) {
    $(function() {
        if ('undefined' !== typeof FWP) {
            FWP.loading_handler = function(params) {}
        }
    });
})(jQuery);
</script>
<?php
}, 100 );