Fatal error: Uncaught TypeError: Argument 1 passed to TicketSystem::orderPassCheck() must be an instance of WC_Order, bool given, called in /wp-content/plugins/ticket-system/page/inv_download.php on line 11 and defined in /wp-content/plugins/ticket-system/includes/class/TicketSystem.php:1216 Stack trace: #0 /wp-content/plugins/ticket-system/page/inv_download.php(11): TicketSystem->orderPassCheck(false, NULL, '../') #1 /wp-includes/template-loader.php(106): include('/wp-content/plu...') #2 /wp-blog-header.php(19): require_once('/wp-includes/te...') #3 /index.php(17): require('/wp-blog-header...') #4 {main} thrown in /wp-content/plugins/ticket-system/includes/class/TicketSystem.php on line 1216