Fatal error: Uncaught Error: Call to undefined function esc_url() in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/admin-views/flexible-tickets/admin/tickets/editor/upsell-notice.php:10 Stack trace: #0 {main} thrown in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/admin-views/flexible-tickets/admin/tickets/editor/upsell-notice.php on line 10