Fatal error: Uncaught Error: Class "PKP\notification\NotificationManagerDelegate" not found in /home/jurna812/public_html/lib/pkp/classes/notification/managerDelegate/AnnouncementNotificationManager.php:28 Stack trace: #0 {main} thrown in /home/jurna812/public_html/lib/pkp/classes/notification/managerDelegate/AnnouncementNotificationManager.php on line 28