Broken Portfolio link

There is a broken link within the portfolio template. I’ve just created the four column portfolio category in the menu along with the photos with their description. Once you click on the photo link the broken link appears. It’s called enigma-portfolio and goes to a 404 page. I can’t change it so will link back to the portfolio page. I don’t want to change the name of my portfolio to enigma-portfolio so it works. It’s also created in the permalink. I checked out your demo and it’s doing the same thing as my website. Do you know of a fix or can you fix it?

Here is the link to my page:

http://laurenaroberts.com/enigma-portfolio/cycling-2/