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