failure iyzico payment method in laravel 8 - php

Question

I have installed Iyzico payment method by Composer and I followed each step in the documentation but
I Am Trying To Load Default Form Of Iyzico Payment
But It's Show Me That Failure Status When i am reloading the page it is just Dispaly the
odeme sayfa and Failure
so how can i do it please
here is my code in controller
public function payment()
{
$iyzico = new Iyzico();
$payment = $iyzico->setForm([
'conversationID' => '123456789',
'price' => '120.0',
])
->paymentForm();
$paymentContent = $payment->getCheckoutFormContent();
$paymentStatus = $payment->getStatus();
return view(
'iyzico',
compact('paymentContent', 'paymentStatus')
);
}
here is iyzico class code
<?php
namespace App\Libraries;
use PhpParser\Node\Expr\Cast\Array_;
class Iyzico
{
protected $options;
protected $request;
protected $basketItems;
public function __construct()
{
$this->options = new \Iyzipay\Options();
$this->options->setApiKey("your api key");
$this->options->setSecretKey("your secret key");
$this->options->setBaseUrl("https://sandbox-api.iyzipay.com");
$this->basketItems = [];
}
public function setForm(array $params)
{
$this->request = new \Iyzipay\Request\CreateCheckoutFormInitializeRequest();
$this->request->setLocale(\Iyzipay\Model\Locale::TR);
$this->request->setConversationId($params['conversationID']);
$this->request->setPrice($params['price']);
return $this;
}
public function setBuyer(array $params)
{
$buyer = new \Iyzipay\Model\Buyer();
$buyer->setId($params['id']);
$buyer->setName($params['name']);
return $this;
}
public function setShipping(array $params)
{
$shippingAddress = new \Iyzipay\Model\Address();
$shippingAddress->setContactName($params['name']);
$this->request->setShippingAddress($shippingAddress);
return $this;
}
public function setBilling(array $params)
{
$billingAddress = new \Iyzipay\Model\Address();
$billingAddress->setContactName($params['name']);
$this->request->setBillingAddress($billingAddress);
return $this;
}
public function setItem(array $items)
{
foreach ($items as $key => $value) {
$basketItem = new \Iyzipay\Model\BasketItem();
$basketItem->setId($value['id']);
$basketItem->setName($value['name']);
array_push($this->basketItems, $basketItem);
}
$this->request->setBasketItems($this->basketItems);
return $this;
}
public function paymentForm()
{
$form = \Iyzipay\Model\CheckoutFormInitialize::create($this->request, $this->options);
return $form;
}
}
here is my iyzico.blade.php page
<article>
<h1>odeme sayfa</h1>
<div>
{{ $paymentContent }}
{{ $paymentStatus }}
<div id="iyzipay-checkout-form" class="responsive"></div>
</div>
</article>