How to Add Layers Slider to Esports theme.

Hi,

I am using Esports demo . on this demo at home page there is post slider is running.
But i want to replace it with layer slider.
In theme option at home slider I have only check slider.
But at home page it shows blank area, not showing my layer slider. This is the link

https://www.therektfastclub.com

Also at home page not able to find any option which give you to select the slider.

Also when i edit home page with Elementor showing black area. Not allowing me to add layer slider into that blank area after main menu.
Please help us to solve this issue.
Guide us the step