Fatal error: Uncaught Error: Call to undefined function sanitize_html_class() in /home/malvernj/public_html/wp-content/plugins/event-tickets-plus/src/views/v2/modal/attendee-registration.php:22 Stack trace: #0 {main} thrown in /home/malvernj/public_html/wp-content/plugins/event-tickets-plus/src/views/v2/modal/attendee-registration.php on line 22