Error

[rodrodevs-mine]

How to Fix It , connection Refused

public function execute(Request $request, $username, $id) {
try {
$bohudur = Bohudur::make(env('BOHUDUR_API_KEY'));
$paymentKey = $request->get('payment_key');
$response = $bohudur->execute($paymentKey);
$product = Product::find($id);

        if ($response->success()) {

            $rcon = new Rcon('tiger.qbitnode.com', 4372, 'cmd', 5);

            if ($rcon->connect()) {
                if ($product->category == 'rank') {
                    $rcon->sendCommand("lp user {$username} parent set {$product->ingamename}");
                } elseif ($product->category == 'crate') {
                    $rcon->sendCommand("crate giveKey {$product->ingamename} {$username} 1");
                }

                flash()->success('Order complete');
                return redirect()->route('home');
            }

        } elseif ($response->pending()) {
            flash()->success('Order Pending');
            return redirect()->route('home');

        } elseif ($response->failed()) {
            flash()->error('Something went wrong!');
            return redirect()->route('home');
        }

    } catch (\Bohudur\LaravelSDK\Exceptions\BohudurException $e) {
        dd("Verification Error: " . $e->getMessage());
    }
}