Fullwidth Easy Slider Images Not Appearing

No images from the Fullwidth Easy Slider are visible on my website (http://blogs.westmont.edu/eatoncenter/), nor are any images in the Partner/Logo element on this page (http://blogs.westmont.edu/eatoncenter/alumni/). Nothing on my website has changed, but all of the images have disappeared suddenly (though they are still visible in the backend).

Any idea what might be going on?

Thanks in advance for your help!