paypal sandbox is not executing payment - php

Question

It's for couple of days, I'm using php sdk. It was working before, but now they are not executing my subscription and charge payment. I only get PAYMENT.SALE.PENDING event whenever a payment has made.
Please help, this is driving me crazy.
I get the payment status "approved", but I'm not getting the 'PAYMENT.SALE.COMPLETED' webhook, I don't know what's wrong.
Here is my code:
create:
public function doPayPalCharge($returnUrl, $cancelUrl)
{
$apiContext = $this->apiContext;
$money = $this->getAmount();
$customData = $this->getMetadata();
// Create new payer and method
$payer = new Payer();
$payer->setPaymentMethod("paypal");
// Set redirect urls
$redirectUrls = new RedirectUrls();
$redirectUrls->setReturnUrl($returnUrl)
->setCancelUrl($cancelUrl);
// Set payment amount
$amount = new Amount();
$amount->setCurrency("USD")
->setTotal($money);
// Set transaction object
$transaction = new Transaction();
$transaction->setAmount($amount)
//can not use json_encode here, because can not decode data from web hook
->setCustom(base64_encode(serialize($customData->all)))
->setDescription("Payment description");
// Create the full payment object
$payment = new Payment();
$payment->setIntent('sale')
->setPayer($payer)
->setRedirectUrls($redirectUrls)
->setTransactions([$transaction]);
$request = clone $payment;
// Create payment with valid API context
try
{
$payment->create($apiContext);
$token = $this->getPayPalTokenFromUrl($payment->getApprovalLink());
} catch (PayPalConnectionException $e)
{
self::payPalLog($e, '[PayPalConnectionException]', (array)$request);
} catch (\Exception $e)
{
self::payPalLog($e, '[Create Payment Failed]', (array)$request);
}
return isset($token) ? $token : '';
}
execute:
public function confirmPayPalCharge($payment_id, $payer_id)
{
$apiContext = $this->apiContext;
// Get payment object by passing paymentId
$payment = Payment::get($payment_id, $apiContext);
// Execute payment with payer id
$execution = new PaymentExecution();
$execution->setPayerId($payer_id);
try
{
// Execute payment
$payment = $payment->execute($execution, $apiContext);
} catch (PayPalConnectionException $e)
{
self::payPalLog($e, '[PayPalConnectionException]');
} catch (\Exception $e)
{
self::payPalLog($e);
}
return isset($payment) ? $payment : null;
}