Navbar causing "invisible div" and blocking section content and links

I’ve got an issue where the content on my page isn’t clickable, links and buttons don’t work it’s essentially acting like a big image, the only thing working is the nav bar.

When I set the z-index of the page content (Page Wrapper) above that of the nav bar it goes back to working as normal but I lose the nav bar. I’m not sure why the nav bar is causing the rest of the website to be unresponsive.

Here is my site Read-Only: