I just gave it a try this morning from a fresh install of Wordpress and an empty database. I installed the theme (for WPBackery) and once the configuration was complete I loaded the Business Solutions demo. Everything seems to be working fine. I just had to select the correct font. Maybe this is related to thegem-demo-import (for WPBakery)-4.5.0-Nulled? It will have to be tried when someone has thegem-demo-import (for WPBakery)-4.5.5-Nulled ...
You should know that among the common plugins, I added WooCommerce-4.5.2 and YITH WooCommerce Wishlist-3.0.14.
Another information: when I did my WordPress installation, I changed the prefix for the database. I replaced wp_ with xxx_. The problem is that after installing and activating the plugins, WooCommerce tables were created with the prefix wp_. So I re-installed WordPress leaving the default wp_ prefix.
I'll do the same again with the theme (for Elementor) and keep you posted ...