Sporadically Breaks

This slider is great when it works. However, I’ve had a lot of trouble trying to add new photos. The slider will allow me to choose a new photo, but when I insert it the interface goes blank. In order to add a new photo I have to delete the slider and re-add all of the photos to a new one. This means I have to edit the shortcode ID anytime the slider breaks when adding a new image–not something the less techie admins will be able to keep up with when I’m gone.