Error message when trying to open gallery

Hi guys,

I created 2 galleries with WP Easy Gallery and inserted both of them (shortcode) into a page.
The first gallery opens without any problems when clicking on the thumbnail but when I try to open the second one an error message pops up:

“Image cannot be loaded. Make sure the path is correct and image exist.”

I created both galleries in the exact same way so I really don´t know what´s going on… please help!

http://yfu.org.za/wordpress/galleries/

Thanks!

https://wordpress.org/plugins/wp-easy-gallery/