Fatal error: Uncaught Error: Class "Zend_Mail_Part" not found in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\diablomedia\zendframework1-mail\src\Zend\Mail\Message.php:29 Stack trace: #0 {main} thrown in C:\SHC\xampp\htdocs\shc_mobile_backend\vendor\diablomedia\zendframework1-mail\src\Zend\Mail\Message.php on line 29