Warning: include_once(./_common.php): failed to open stream: No such file or directory in /var/www/html/shop/mypage_seller/order_delivery_update.php on line 2

Warning: include_once(): Failed opening './_common.php' for inclusion (include_path='.:/usr/share/pear:/usr/share/php') in /var/www/html/shop/mypage_seller/order_delivery_update.php on line 2

Fatal error: Uncaught Error: Call to undefined function check_demo() in /var/www/html/shop/mypage_seller/order_delivery_update.php:4 Stack trace: #0 {main} thrown in /var/www/html/shop/mypage_seller/order_delivery_update.php on line 4