Images not visible

I have a problem:
I made a website with Sparkle (3 pro). The uploaded images are visible only on Safari, while with Crome and Firefox you can’t see them. How can I do it?: www.francescorenzi.com/architetto

Thanks for your help

Francesco

As answered via email, for the benefit of others, the same answer as this one stands. It’s a mis configured IIS server.

Thank you, now all is working!