if you received the builder plugin with the theme Bundled plugins then please note:
Theme Bundled plugins do not have their own licenses (purchase code). This means they cannot be activated mean registered for updates. So you can safely ignore any plugin activation/registration messages and theme Bundled plugin will work fine for you.
You can check this Help article:
If you really want to register/activate the license of the builder plugin then you have to purchase individual license for the plugin(s) from codecanyon.net and you have to register/activate the license.
Now you can use the purchase code (exist in the pdf) to verify your purchased theme license. please note theme purchase code can’t be in the bundle plugins. Theme Bundled plugins do not have their own licenses (purchase code).