Fatal error: Uncaught Error: Class "Ratchet\AbstractConnectionDecorator" not found in C:\xampp\htdocs\hannoole\schol\vendor\cboden\ratchet\src\Ratchet\Wamp\WampConnection.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\hannoole\schol\vendor\cboden\ratchet\src\Ratchet\Wamp\WampConnection.php on line 12