In subdirectory multisite WP license key needed only once

I have created a WordPress multisite network where multiple sites are running on subdirectories under a subdomain.
When I attempt to activate a (wpcafe-pro.v.2.2.29) plugin, I encounter the result shown in the attached images.
And the solution was:
In our system you don’t need to activate the license key on the subfolder
You just need to activate it on the main directory.
Great support team.