- Loads autoloader class and initializes the plugin

lib/Config/Initializer.php

@@ -10,6 +10,15 @@ use MailPoet\WP\Notice as WPNotice;
 if(!defined('ABSPATH')) exit;
 
 require_once(ABSPATH . 'wp-admin/includes/plugin.php');
+require_once(MAILPOET_PATH . '/vendor/autoload.php');
+
+$initializer = new Initializer(
+  array(
+    'file' => MAILPOET_FILENAME,
+    'version' => MAILPOET_VERSION
+  )
+);
+$initializer->init();
 
 class Initializer {