Объект класса Illuminate \ Routing \ Redirector не может быть преобразован в строку при интеграции PayPal в реальном времени в Laravel

Question

• 1000 в строку

, когда я печатаю $ response, который я получаю:

array:3 [▼
  "type" => "error"
  "message" => ""
  "paypal_link" => null
]

У меня есть пустой app_id, это может вызвать проблему. Мой код выглядит следующим образом:

Контроллер:

public function payment(Request $request)
{
    .....
    .....
    $data['return_url'] = route('payment.success',$r_id);
    $data['cancel_url'] = route('payment.cancel');
    $data['total'] = $tot_amt
    $provider = new ExpressCheckout;
    $response = $provider->setExpressCheckout($data);
    $response = $provider->setExpressCheckout($data, true);
    return redirect($response['paypal_link']);
}

PayPal:

return [
    'mode'    => env('PAYPAL_MODE', 'live'),
    'sandbox' => [
        'username'    => env('PAYPAL_SANDBOX_API_USERNAME', ''),
        'password'    => env('PAYPAL_SANDBOX_API_PASSWORD', ''),
        'secret'      => env('PAYPAL_SANDBOX_API_SECRET', ''),
        'certificate' => env('PAYPAL_SANDBOX_API_CERTIFICATE', ''),
        'app_id'      => '', // Used for testing Adaptive Payments API in sandbox mode
    ],
    'live' => [
        'username'    => env('PAYPAL_LIVE_API_USERNAME', ''),
        'password'    => env('PAYPAL_LIVE_API_PASSWORD', ''),
        'secret'      => env('PAYPAL_LIVE_API_SECRET', ''),
        'certificate' => env('PAYPAL_LIVE_API_CERTIFICATE', ''),
        'app_id'      => '', // Used for Adaptive Payments API
    ],

    'payment_action' => 'Sale', // Can only be 'Sale', 'Authorization' or 'Order'
    'currency'       => env('PAYPAL_CURRENCY', 'USD'),
    'billing_type'   => 'MerchantInitiatedBilling',
    'notify_url'     => '', // Change this accordingly for your application.
    'locale'         => '', // force gateway language  i.e. it_IT, es_ES, en_US ... (for express checkout only)
    'validate_ssl'   => true, // Validate SSL when creating api client.
];

.env

PAYPAL_LIVE_API_USERNAME='XXXXXXXXXX'
PAYPAL_LIVE_API_PASSWORD='XXXXXXXX'
PAYPAL_LIVE_API_SECRET='XXXXXXXXXXXXXXX'
PAYPAL_CURRENCY=USD
PAYPAL_LIVE_API_CERTIFICATE='XXXXXXXXXXXXXXXXXX'