Javascript and CSS not loading

Hello

there is a problem with your plugin. I use the free version and I added some images on my variant products. If you check the production website https://www.felisibagsandbelts.com/it/portachiavi-farfalla-in-pelle-di-vacchetta/ you can see there is a problem showing the gallery, no js and CSS are loading. If you check the same page on the staging website https://staging.felisibagsandbelts.com/it/portachiavi-farfalla-in-pelle-di-vacchetta/ there is no problem with the gallery. This is because I deactivated the plugin

I checked before it was a cache plugin error or something like this but I deactivate all the plugin cache and similar. I also see on the production page, if I’m logged no errors occur and all work well… only if I am in guest mode.

Can you help me to understand?

Thanks

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