I installed this theme and taken from library the “Target” demo and there was no problem until I set up pages with wpbakery.
It seems to be ok, but when you zoom it appears a margin in the right part of the site and you can scroll to right in your nav.
It also happens in mobile version.
If you check home page you can see it.
If you go blog, you can see its fine and its responsive correctly but it fails with all pages created with wpbakery.