Design window foreground problem

Dear support team,

I’m testing your plugin in lite version before buying the pro version, but I have a problem. The design window does not appear in the foreground. The menu and footer levels remain in the foreground, thus preventing the creation of the design.
This is the test page I created: https://www.mrvertigovinylrecords.com/vinylpress/prodotto/vinile-7/

Thanks for your help.