Fatal error: Uncaught Error: Class 'MailPoet\Config\Populator' not found in /var/www/html/wordpress/wp-content/plugins/mailpoet/lib/Config/Activator.php:22 Stack trace: #0 /var/www/html/wordpress/wp-content/plugins/mailpoet/lib/Config/Initializer.php(149): MailPoet\Config\Activator->activate() #1 /var/www/html/wordpress/wp-content/plugins/mailpoet/lib/Config/Initializer.php(209): MailPoet\Config\Initializer->runActivator() #2 /var/www/html/wordpress/wp-content/plugins/mailpoet/lib/Config/Initializer.php(172): MailPoet\Config\Initializer->maybeDbUpdate() #3 /var/www/html/wordpress/wp-includes/class-wp-hook.php(286): MailPoet\Config\Initializer->initialize('') #4 /var/www/html/wordpress/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #5 /var/www/html/wordpress/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #6 /var/www/html/wordpress/wp-settings.php(450): do_action('init') #7 /var/www/html/wordpress/wp-config.php(137): require_once('/var/www/html/w...') #8 /var/www/html/wordpress/wp-load.php(3 in /var/www/html/wordpress/wp-content/plugins/mailpoet/lib/Config/Activator.php on line 22