External URL in nav bar doesn't work in bootstrap

Recently set up a theme running bootstrap to run as our website. Everything works fine, including external URLs that have been placed in the HTML.

The thing is, the actual navigation bar does not register the external URLs and will not open them when you click. It's being stopped by the JS "Magnific Popup" but I do not know why specifically. Any help would be greatly appreciated.

Here is a link to the website, and the navigation bar with the error is top-right.

Rustoria Website