Fatal error: Uncaught Error: Interface "Ratchet\MessageComponentInterface" not found in C:\xampp\htdocs\hannoole\schol\vendor\cboden\ratchet\src\Ratchet\Server\IpBlackList.php:6 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\schol\vendor\cboden\ratchet\src\Ratchet\Server\IpBlackList.php on line 6