Fatal error: Uncaught Error: Class "Amp\Websocket\WebsocketException" not found in /lamp/www/quantix/vendor/amphp/websocket/src/Parser/WebsocketParserException.php:7 Stack trace: #0 {main} thrown in /lamp/www/quantix/vendor/amphp/websocket/src/Parser/WebsocketParserException.php on line 7