Fatal error: Uncaught Error: Class 'TEC\Tickets\Integrations\Integration_Abstract' not found in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/Tickets/Notifications/Notifications.php:21 Stack trace: #0 {main} thrown in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/Tickets/Notifications/Notifications.php on line 21