ajdood on "HTTP 500 - Site isn't loading"

I have the latest versions of the browsers

Could be a local issue. I crawled the site using screaming frog tool and none of the URLs have status codes of 500.

Yet as I am typing I can't view my site on Firefox

and this URL on chrome:

http://www.chooseheadphones.co.uk/jaybird-earphones/bluebuds-x-review/