Page Speed Problem with Magic Action Box JavaScript

To Developer;
Google Page Speed test shows a critical problem with Magic Action Box JavaScript at https://www.domain.com/wp-content/plugins/magic-action-box-pro/assets/js/actionbox-helper.js?ver=4.0 and Google recommends that it MUST be fixed.

How can we asynchronously load your javascript? Can developer of this plugin find a solutiion please?

Thanks

https://wordpress.org/plugins/magic-action-box/