Fatal error: Uncaught Error: Call to undefined function apply_filters() in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/admin-views/tpp-orders.php:21 Stack trace: #0 {main} thrown in /home/malvernj/public_html/wp-content/plugins/event-tickets/src/admin-views/tpp-orders.php on line 21