Slideshows not showing

Hi,

I have a problem on my blog when posting a slideshow. As you can see here, for example, there is a grey space left where the slideshow should appear. It used to work fine, but seems that after the latest WP update, it stopped working. It is showing the following message: “This slideshow requires JavaScript”.

I already checked a few things:
– There isn’t any incompatibility with any other plugin
– It seems to be an issue related with my theme (seems to be abandoned; no, I don’t want to change it)

If someone knows how to solve it, I would appreciate your help.

Thanks!

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