Hello,
You are welcome. Yes, you need to keep Combina file JavaScript option enabled if you want to use Rinvia il blocco di visualizzazione JS option.
Yes, there is no need to switch to the parent theme because the child theme was not the reason of the issue.
You can read more about child theme here https://developer.wordpress.org/themes/advanced-topics/child-themes/
Regards
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.
