License activation in a multisite environment works differently from the standard process, especially if the plugin is only being used on a single site within the network.
Note: A Business subscription is required to use the Product Feed Elite plugin in a multisite environment
Here’s how to do it
Network-wide Activation
If you’re adding the plugin to all sites in your multisite environment, go to the Network Admin > Plugin screen and activate it. This will add a new Adtribes License menu on the Network Admin screen, allowing you to activate the plugin.

Activate on Subsite
If you’re installing the plugin on specific sites within your multisite network, activate it from the “Main” site’s dashboard first. This will enable the Adtribes License menu for license activation.

Please keep in mind that even if you’re installing the Product Feed Elite plugin on just one site, a Business subscription is still required.