درگاه پرداحت زرین پال

سلام دوستان چرا درگاه زرین برای من خطای زیر رو میده

اینم کدهای مربوط بهش

    public function payment()
    {
        $this->validate(request(), [
            'course_id' => 'required'
        ]);
        $course = Course::findOrFail(request('course_id'));
 
        if(auth()->user()->checkLearning($course)){
            Alert::error('دقت کنید', 'شما قبلا در این دوره ثبت نام کردید ')->showConfirmButton($btnText = 'بسیار خوب', $btnColor = '#c51162');
        }
 
        if ($course->price == 0 && $course->type == 'vip') {
            Alert::error('دقت کنید', 'شما قادر به خرید این دوره نیستید')->showConfirmButton($btnText = 'بسیار خوب', $btnColor = '#c51162');
            return back();
        }
 
        $price = $course->price;
 
        $Description = 'توضیحات تراکنش تستی'; // Required
        $Email = auth()->user()->email; // Optional
        $CallbackURL = 'http://localhost:8000/course/payment/check'; // Required
 
        $client = new SoapClient('https://www.zarinpal.com/pg/services/WebGate/wsdl', ['encoding' => 'UTF-8']);
 
        $result = $client->PaymentRequest(
            [
                'MerchantID' => $this->MerchantID,
                'Amount' => $price,
                'Description' => $Description,
                'Email' => $Email,
                'CallbackURL' => $CallbackURL,
            ]
        );
        //Redirect to URL You can do it also by creating a form
        if ($result->Status == 100) {
 
            auth()->user()->payments()->create([
                'resnumber' => $result->Authority,
                'price' => $price,
                'course_id' => $course->id,
            ]);
 
            return redirect('https://www.zarinpal.com/pg/StartPay/' . $result->Authority);
        } else {
            echo 'ERR: ' . $result->Status;
        }
    }
 
    public function check()
    {
        $Authority = request('Authority');
 
        $payment = Payment::whereResNumber($Authority)->firstOrFail();
 
        $course = Course::findOrFail($payment->course_id);
 
        if (request('status') == 'ok') {
            $client = new SoapClient('https://www.zarinpal.com/pg/services/WebGate/wsdl', ['encoding' => 'UTF-8']);
 
            $result = $client->PaymentVerification(
                [
                    'MerchantID' => $this->MerchantID,
                    'Authority' => $Authority,
                    'Amount' => $payment->price,
                ]
            );
            if ($result->Status == 100) {
                if($this->AddUserForLearning($payment , $course)){
                    Alert::success('با تشکر','پرداخت با موفقیت انجام شد شد')->showConfirmButton($btnText = 'بسیار خوب', $btnColor = '#c51162');
                    return redirect($course->path());
                }
            } else {
                echo 'Transaction failed. Status:' . $result->Status;
            }
        } else {
            echo 'Transaction canceled by user';
        }
    }
 
    protected function AddUserForLearning($payment , $course)
    {
        $payment->update([
            'payment'=>1
        ]);
 
        Learning::create([
            'user_id'=> auth()->user()->id,
            'course_id'=> $course->id,
        ]);
 
        return true;
    }