In order to use the integrations, you need to have the following plugin/services installed and activated:
The Newsletter plugin is a tool for creating and sending newsletters, post notifications, and autoresponders from a WordPress website. It allows users to create and design email campaigns using customizable templates and to manage and segment their subscriber lists. The plugin also includes automatic blog post notifications, integration with popular email marketing services, and support for opt-in and double opt-in email subscriptions.
Events Manager is a WordPress plugin that allows website owners to manage and promote events on their WordPress website. It includes ticket sales, venue and organizer management, and customizable event listings. The plugin suits many businesses and organizations, including event venues, ticketing companies, and community organizations. Its flexibility and customization options make it popular for event management on WordPress websites.