Fatal error: Uncaught Error: Class "PKP\notification\NotificationManagerDelegate" not found in C:\xampp\htdocs\ojs\lib\pkp\classes\notification\managerDelegate\SubmissionNotificationManager.php:26 Stack trace: #0 {main} thrown in C:\xampp\htdocs\ojs\lib\pkp\classes\notification\managerDelegate\SubmissionNotificationManager.php on line 26