Magento – An error occurred on the server. Please try to place the order again. In Magento 2

magento2

I have configure Authorize.Net Payment method in magento 2,
But i am getting "An error occurred on the server. Please try to place the order again" after click on place order.

Also sometimes its work's perfectly. So i need to know is ti magento issue or payment gateway issue. Thanks in advance. Let me know if you need more information.

Best Answer

To know the exact reason why it is happen so, please open below file:

vendor/magento/module-checkout/Model/PaymentInformationManagement.php

than comment out the try, catch and put code to place order directly as below:

Replace below function 

public function savePaymentInformationAndPlaceOrder(
    $cartId,
    \Magento\Quote\Api\Data\PaymentInterface $paymentMethod,
    \Magento\Quote\Api\Data\AddressInterface $billingAddress = null
) {
    $this->savePaymentInformation($cartId, $paymentMethod, $billingAddress);
    try {
        $orderId = $this->cartManagement->placeOrder($cartId);
    } catch (\Exception $e) {
        //var_dump($e);
        throw new CouldNotSaveException(
            __('An error occurred on the server. Please try to place the order again.'),
            $e
        );
    }
    return $orderId;
}

To

public function savePaymentInformationAndPlaceOrder(
    $cartId,
    \Magento\Quote\Api\Data\PaymentInterface $paymentMethod,
    \Magento\Quote\Api\Data\AddressInterface $billingAddress = null
) {
    $this->savePaymentInformation($cartId, $paymentMethod, $billingAddress);
    //try {
        $orderId = $this->cartManagement->placeOrder($cartId);
    /*} catch (\Exception $e) {
        //var_dump($e);
        throw new CouldNotSaveException(
            __('An error occurred on the server. Please try to place the order again.'),
            $e
        );
    }*/
    return $orderId;
}

Now, try to place order again. You will be able to see the detailed error in log file or may be in console.