Fatal error: Uncaught Error: Class 'WPForms\Emails\Mailer' not found in C:\xampp\htdocs\wp-content\plugins\wpforms-lite\src\Emails\Notifications.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wp-content\plugins\wpforms-lite\src\Emails\Notifications.php on line 15