Fatal error: Uncaught Error: Class 'TEC\Tickets\Emails\Email_Abstract' not found in /home/malvernj/public_html/wp-content/plugins/event-tickets-plus/src/Tickets_Plus/Waitlist/Emails/Spot_Available.php:23 Stack trace: #0 {main} thrown in /home/malvernj/public_html/wp-content/plugins/event-tickets-plus/src/Tickets_Plus/Waitlist/Emails/Spot_Available.php on line 23