Enabling The Mega Menu to LaVenta Pro Theme

Hi, I've tried all possible options to activate the mega menu in my theme but without success! When I change theme, it looks like it is active on other themes but not this one! I've tried WP mega menu, Max mega menu and Elementor via ElementKit... none of them seems to work for the theme. https://lordshayne.com/ Can you please help? Thanks, Shayne