If you need to activate the official gVectors addons on a WordPress Multisites follow the steps below.
First of all, you need to know that you should be activated on the main site using the "Network Activate" link.
In most cases, the users just install the addons on the Network Admin section (without activation) then go to Subsites > Plugins section and activate the addons there. This is not the correct solution for official addons created by gVectors team. As far as the updates are not being checked from WordPress.org, but from our servers. So in most cases, you may not get the notifications about the new versions of the addon. Please note: the addons must be activated on the Network Admin > Plugins > Installed Plugins section. If you don't need the addons on some subsites, simply go to the current Subsite > Plugins > Installed Plugins admin page find and deactivate the addon from that page.