Slider not working

Hi... I want ask how to create a carousel slider? I've tried to integrate a static HTML to GRAV, but it's not working when I tried to push the button. In static HTML, it works.

This is the static HTML --> HTML
This is the theme that I already converted --> THEME

Cheers :)

Grav already has a slider plugin https://github.com/getgrav/grav-plugin-lightslider you can use it or take inspiration from it to integrate any other carousel you'd like to use