Notice: Undefined index: class in C:\xampp\htdocs\web_roadhouse\db\queries\reservations.inc.php on line 13

Fatal error: Uncaught Exception: Error adding reservation: SQLSTATE[HY093]: Invalid parameter number in C:\xampp\htdocs\web_roadhouse\db\queries\reservations.inc.php:21 Stack trace: #0 C:\xampp\htdocs\web_roadhouse\api\reservations\add_reservation.php(6): add_reservation(Object(PDO), Array) #1 {main} thrown in C:\xampp\htdocs\web_roadhouse\db\queries\reservations.inc.php on line 21