Fatal error: Uncaught Error: Class 'Ratchet\Wamp\Exception' not found in /app/web/vendor/cboden/ratchet/src/Ratchet/Wamp/JsonException.php:4 Stack trace: #0 {main} thrown in /app/web/vendor/cboden/ratchet/src/Ratchet/Wamp/JsonException.php on line 4