Make horizontal scroll sticky

Hi everyone,
I have a bit of an issue. I am trying to create a new page and decided that some horizontal scrolling might me neat. So I followed this tutorial: Advanced interactions: Horizontal scroll in Webflow - YouTube
Since I need to use a collection list for the content I cannot follow the tutorial to the dot but I believe I did most of it right. I managed to get the horizontal scroll to work, but I did not get the vertical scroll to stop which scrolling horizontally. Any chance any of you could point me into the right direction?

Thanks, M