create_function() depricated in pso_admin.php

This plugin uses a depricated function (php 7.2), causing an error above every page:

Deprecated: Function create_function() is deprecated in /home/admin/web/domain.com/public_html/wp-content/plugins/optimizer-for-faster-websites/adminpages/pso_admin.php on line 296

Can you fix this?

https://www.php.net/manual/en/function.create-function.php