WebSocket Issue

I'm trying to send data using WebSocket using this package https://github.com/ratchetphp/Pawl

My goal is to send data to my server ws://localhost:6000

Then this is the script:

        \Ratchet\Client\connect($url)->then(function ($conn) {
                $data = json_encode(['message'=>'Hello']);
                $conn->send($data);
                $conn->close();
        });

This works with perfect and successfully sends the payload. But when i'm trying to call this script in Tinker it's not working.

But when i tried to dd() the script it will work.

        dd(\Ratchet\Client\connect($url)->then(function ($conn) {
                $data = json_encode(['message'=>'Hello']);
                $conn->send($data);
                $conn->close();
        }));

Any ideas to fix this? Thanks in advance.