Fatal error: Uncaught ValueError: mysqli_query(): Argument #2 ($query) cannot be empty in C:\xampp\htdocs\intranet_api\database.php:75 Stack trace: #0 C:\xampp\htdocs\intranet_api\database.php(75): mysqli_query(Object(mysqli), '') #1 C:\xampp\htdocs\intranet_api\clases\listados_ventas.php(498): database->query() #2 C:\xampp\htdocs\intranet_api\ventas\listado_pedidos.php(15): listados_ventas->crear_json_pedidos(NULL) #3 {main} thrown in C:\xampp\htdocs\intranet_api\database.php on line 75