Nivo Slider not showing any image

Hi, plugin work fine but I can’t get the Nivo slider to show any images, while all the other galleries work fine. Please see link below:
https://www.emporium.it/news/some-news/

only navigation buttons are visible but no slides/images displaying.

Any idea why?

Thank you

https://www.ads-software.com/plugins/inpost-gallery/