Fatal error: Uncaught Error: Class 'Ratchet\WebSocket\Version\RFC6455' not found in /app/web/vendor/cboden/ratchet/src/Ratchet/WebSocket/Version/HyBi10.php:5 Stack trace: #0 {main} thrown in /app/web/vendor/cboden/ratchet/src/Ratchet/WebSocket/Version/HyBi10.php on line 5