Hi,
After clicking on the small product image there is no option to close that image or scroll through all the images.
Other themes do it with fancybox
How could I do it?
thank you

The solution was in the forum and when searching I applied the change mentioned by @MB Themes   which is to change:
in Settings > General change Jquery 1.x.x  fot this 3.x.x

I have checked osclass 4.5 that is in development and it works so basically the issue is if you use jQuery 1.x.x in Settings > General.
When changed to 3.x.x, fancybox library will load and it should work OK.