BuddyBuilder Licenses are applicable to individual sites. Licenses are used across different websites based on the pricing plan that you select.
In order to activate the license on a multisite, you will need to carry out the following:
1. Ensure that the BuddyBuilder Pro plugin is not activated throughout the network
2. Activate the BuddyBuilder Pro plugin within the individual sites
3. Navigate to the Settings > BuddyBuilder Pro Activation section within the individual sites, fill in your license(s) and save your changes