Fatal error: Uncaught Error: Class 'Zend\Mail\Exception\RuntimeException' not found in /home/appilogicx/public_html/marketing/vendor/zendframework/zend-mail/src/Header/Exception/RuntimeException.php:12 Stack trace: #0 {main} thrown in /home/appilogicx/public_html/marketing/vendor/zendframework/zend-mail/src/Header/Exception/RuntimeException.php on line 12