I'm building a landing page using React Router that has a scrolling menu. Based on the position of the scrolling menu, the background elements change. Everything works, until I navigate to a different page, and receive Uncaught TypeError: Cannot read property 'classList' of null. When I return to the landing page, the ScrollTrigger is broken until the site is refreshed. I know this is due to the component unmounting and ScrollTrigger not being able to find the elements triggering onLeave and onL