Fatal error: Uncaught Error: Call to undefined function _get_list_table() in /var/www/html1/wp-content/plugins/salon-booking-system/src/SLB_Discount/Admin/DiscountsHistoryList.php:5 Stack trace: #0 {main} thrown in /var/www/html1/wp-content/plugins/salon-booking-system/src/SLB_Discount/Admin/DiscountsHistoryList.php on line 5