Fatal error: Uncaught Error: Call to undefined function register_activation_hook() in /home/gilanf/public_html/wp-content/plugins/ticketa/class/virtual-page.php:9 Stack trace: #0 /home/gilanf/public_html/wp-content/plugins/ticketa/class/virtual-page.php(855): TicketaVirtualPage->__construct() #1 {main} thrown in /home/gilanf/public_html/wp-content/plugins/ticketa/class/virtual-page.php on line 9