Slider is not working

Hello all,

The built-in slider on my site is not working. It’s not a plugin its the normal slider from WP. It’s just displaying a loading icon but no pics are shown. Inside the admin panel the pics are there and no change has been made to the slider.

If anyone has had this problem and has resolved it, I would appreciate the help.

Link to the site: http://armstrade.net/en/