Fatal error: Uncaught Error: Class "TEC\Tickets\Emails\Email_Abstract" not found in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/Tickets/Emails/Email/RSVP_Not_Going.php:20 Stack trace: #0 {main} thrown in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/Tickets/Emails/Email/RSVP_Not_Going.php on line 20