My posts don’t show the slideshows anymore

I have an issue with the image slideshows which I put in my blogs.

Since a short time they are not shown anymore on our website. The normal pictures are shown, but slideshows are not visable anymore.

When I try to edit the blogpost/message I can still see them and edit them, but when I post the blog or watch a preview they are already not visable anymore.

Can someone please help me how to solve this issue?

The page I need help with: [log in to see the link]