Fatal error: Uncaught Error: Class 'Ratchet\AbstractConnectionDecorator' not found in /app/web/vendor/cboden/ratchet/src/Ratchet/Wamp/WampConnection.php:12 Stack trace: #0 {main} thrown in /app/web/vendor/cboden/ratchet/src/Ratchet/Wamp/WampConnection.php on line 12