Fatal error: Uncaught Error: Class 'Ratchet\AbstractConnectionDecorator' not found in /app/web/vendor/cboden/ratchet/src/Ratchet/WebSocket/Version/Hixie76/Connection.php:9 Stack trace: #0 {main} thrown in /app/web/vendor/cboden/ratchet/src/Ratchet/WebSocket/Version/Hixie76/Connection.php on line 9