server.php freeze on $app->run(); code 
i run the sample code that provided : 

```
<?php
use Ratchet\Server\IoServer;
use Ratchet\Http\HttpServer;
use Ratchet\WebSocket\WsServer;
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

require '/home/adadshenas/public_html/APC/vendor/autoload.php';

class MyChat implements MessageComponentInterface {
    protected $clients;

    public function __construct() {
        $this->clients = new \SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        foreach ($this->clients as $client) {
            if ($from != $client) {
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        $conn->close();
    }
}

    try {
        $app = new Ratchet\App('adadshenas', 8080);
        $app->route('/chat', new MyChat, array('*'));
        $app->route('/echo', new Ratchet\Server\EchoServer, array('*'));
        $app->run();
    } catch (Exception $e) {
        echo "Error: " . $e->getMessage();
    }


```
it is from my ubuntu vps,

now when i run code it give me : Error: Failed to listen on "tcp://127.0.0.1:8080": Address already in use (EADDRINUSE)root@158-255-77-42:~#

i testes many ports, but it not worked

**with 2 linux commands i killed all proccess from 8080 port, then i runed server.php, after debug i found it freeze on $app->run(); code**

PHP Version : 8.1
Ubuntu Version : 20.4