Laravel: Mollie - webhook failed with status code 500

Question

I'm using the mollie developer setup to simulate payment offers. I've followed a tutorial by my teacher and he hasn't any problems. So what is going on?

Because Mollie is an online service, I'm using Ngrok to create a tunnel for the webhook and my localhost. I'll post my code below but know that I wrote a Log which gave as response:

[2022-07-26 18:22:54] local.ERROR: Method App\Http\Controllers\webHookController::handle does not exist. {"exception":"[object] (BadMethodCallException(code: 0): Method App\Http\Controllers\webHookController::handle does not exist. at C:\Users\stefv\SCHOOL\GENT\NMD\WEBDEV2\werkstuk---geboortelijst-Stef-Verniers\vendor\laravel\framework\src\Illuminate\Routing\Controller.php:68)

I have no clue what exact error this log is targeting so if anyone can point this out, it's much appreciated!

Because the webhook can't get to mollie my status inside my database can't be changed so it's on 'pending' forever...

So I'm looking for a way to fix the error so my webhook can reach Mollie and my payment is accepted so the payment status in my database can change to 'paid'.

This is my code: My Controller which sets up Mollie:

public function additional(Request $r)
{
    $articles = Article::all();
    $categories = Category::all();
    $websites = Website::all();
    $session_id = request()->session()->getId();
    $cartItems = Cart::session($session_id)->getContent();
    $cartTotal = Cart::session($session_id)->getTotal();
    $r->session()->put('cusnaam', 'Cas');
    $r->session()->put('tel', 'Tel');
    $r->session()->put('email', 'Email');
    $r->session()->put('pb', 'pb');

    return view('customer-info', compact('articles', 'categories', 'websites', 'cartItems', 'cartTotal'));
}

public function checkout(Request $r) 
{

    $session_id = request()->session()->getId();
    $cartTotal = Cart::session($session_id)->getTotal();

    $order = new Order();
    $order->name = $r->input('Cus');
    $order->note = $r->input('pb');
    $order->total = $cartTotal;
    $order->status = 'pending';

    $order->save();


    $mollie = new \Mollie\Api\MollieApiClient();
    $mollie->setApiKey("test_6vGchNb62gynePtcsNsbm8dartsmjU");
    $mollie->methods->allAvailable();

    $session_id = request()->session()->getId();
    $cartItems = Cart::session($session_id)->getContent();
    $valuta = number_format($cartTotal, 2);

    
    $webhookUrl = route('webhooks.mollie');

    if(App::environment('local')) {
       $webhookUrl = 'https://5d25-84-199-205-243.eu.ngrok.io/webhooks/mollie';
    };

    $payment = Mollie::api()->payments->create([
        "amount" => [
            "currency" => "EUR",
            "value" => $valuta // You must send the correct number of decimals, thus we enforce the use of strings
        ],
        "description" => "Bestelling op dag " . date('d-m-Y h:i'),
        "redirectUrl" => route('success'),
        "webhookUrl" => $webhookUrl,
        "metadata" => [
            "order_id" => $order->id,
            "order_name" => $order->name
        ],
    ]);

    return redirect($payment->getCheckoutUrl(), 303);

}

public function success()
{
    return view('succes');
}

And this is the controller that handles the webhook:

public function handleWebhookNotification(Request $request) 
{

    $payment = Mollie::api()->payments->get($request->id);
    $orderId = $payment->metadata->order_id;

    if ($payment->isPaid() && ! $payment->hasRefunds() && ! $payment->hasChargebacks()) {

        $order = Order::findOrFail($orderId);
        $order->status = 'paid';
        $order->save();

        Log::alert('tis in de cachoche');

    } elseif ($payment->isOpen()) {
        /*
         * The payment is open.
         */
    } elseif ($payment->isPending()) {
        /*
         * The payment is pending.
         */
    } elseif ($payment->isFailed()) {
        /*
         * The payment has failed.
         */
    } elseif ($payment->isExpired()) {
        /*
         * The payment is expired.
         */
    } elseif ($payment->isCanceled()) {
        /*
         * The payment has been canceled.
         */
    } elseif ($payment->hasRefunds()) {
        /*
         * The payment has been (partially) refunded.
         * The status of the payment is still "paid"
         */
    } elseif ($payment->hasChargebacks()) {
        /*
         * The payment has been (partially) charged back.
         * The status of the payment is still "paid"
         */
    }
    
}