J4 - CK Slideshow doesn't display images in frontend

I upgraded from J3 to J4 (upgrade) and it happens to me that the photos loaded in the BE are not displayed in the FE. The latest version of both J4 and CK Slideshow is installed.
With J3 there were no problems
How can i solve?

Thanks

Hi
Please give me the url of the page so that I can check the problem
CEd

This is the url
nuovo.discovercampania.it/esplora-la-cam...rio/pompei-e-vesuvio

there are multiple JS errors in the page
please try to disable the JS optimization in your template and see if it works
you must fix these errors, as they are the cause of the problem

Hi,
I encountered another js error on another site page with a different component.
I turned off JS optimization and now both work.
Thanks,