While not directly addressing the script you're mentioning, it's crucial to consider the implications of using nulled or cracked software:
: The most straightforward and secure way to use cPanel/WHM is by purchasing a legitimate license. This ensures you receive updates and support.
: There are several high-quality, free alternatives to cPanel that are safe and actively maintained: CyberPanel
No, but cPanel offers a 15-day free trial (recently reduced from 30 days). Some VPS/dedicated providers include the license in their monthly price.