error: self signed certificate issue while implementing WSS signaling server.

[CODEMAX666]

Issue: Unable to Resolve "self signed certificate" Error in PHP WebSocket Server

Description

I am experiencing an issue with my PHP WebSocket server where I continually receive the "self signed certificate" error, despite configuring the server to allow self-signed certificates. Below are the details of my setup and the steps I have taken to try to resolve this issue.

use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;
use React\EventLoop\Loop;
use React\Socket\SocketServer;
use React\Socket\SecureServer;
use Ratchet\Http\HttpServer;
use Ratchet\Server\IoServer;
use Ratchet\WebSocket\WsServer;

$loop = Loop::get();
$webSock = new SocketServer('0.0.0.0:8080', [], $loop);

$secureWebSock = new SecureServer($webSock, $loop, [
    'local_cert' => 'C:\xampp\apache\conf\ssl.crt\ssl.crt',
    'local_pk' => 'C:\xampp\apache\conf\ssl.crt\ssl.key',
    'allow_self_signed' => true,
    'verify_peer' => false,
    'verify_peer_name' => false,
]);

$webServer = new IoServer(
    new HttpServer(
        new WsServer(
            new SignalingServer()
        )
    ),
    $secureWebSock,
    $loop
);

echo "Secure WebSocket server running at wss://0.0.0.0:8080\n";

$webServer->run();

I have tested with wscat.

E:\tmp>wscat -c wss://localhost:8080/check --no-check
Connected (press CTRL+C to quit)
Disconnected (code: 1000, reason: "")

E:\tmp>wscat -c wss://localhost:8080/check
error: self signed certificate

How to solve this problem?
I have also tried with default SSL keys in XAMPP, in that case, I got "error: certificate has expired" error.