Fatal error: Uncaught Error: Class 'Zend\ServiceManager\AbstractPluginManager' not found in /home/appilogicx/public_html/marketing/vendor/zendframework/zend-mail/src/Protocol/SmtpPluginManager.php:20 Stack trace: #0 {main} thrown in /home/appilogicx/public_html/marketing/vendor/zendframework/zend-mail/src/Protocol/SmtpPluginManager.php on line 20