This plugin hasnt been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.
CLP Varnish Cache Plugin for CloudPanel
CloudPanel is a good and lightweight Control Panel that makes Web Hosting simple, easy to manage, and smooth.
The Core Developer constantly engages with the community to improve and add new features.
Hoping to see this product grow more and more.