This plug in allow you to add or subscribe users to Klaviyo’s list memberships and subscriptions using Elementor pro form. Klaviyo offical website: https://www.klaviyo.com/ To achieve this, the pluin using Klaviyo list’s API (you can read more here: https://www.klaviyo.com/docs/api/v2/lists) To use this plugin, you will need an API key provide by Klaviyo when using their services. That mean when using this pluign you are agree with Klaviyo’s Legal, Terms, & Policies here: https://www.klaviyo.com/legal Known Issues: Fatal Error Call to a member function get_modules() on null: Temporary deactivate the plugin update Elementor/Elementor Pro or run Elementor Database Updater Reactivate my plugin again