Support » Plugin: PayPal Plus for WooCommerce » Checkout 500 Error

  • Resolved chr1s9r



    the Paypal Plus extension for WordPress returns a 500 error which breaks the complete checkout when a customer tries to order with a 100% voucher.

    If the voucher is 100% the payment methods are not loaded anymore because paypal plus interrupts is by sending the internal server error:

    2018-08-20T15:15:06+00:00 CRITICAL Uncaught Error: Call to a member function getApprovalLink() on null in /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/woo-paypalplus/src/WC/PayPalPlusGateway.php:517
    Stack trace:
    #0 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/woo-paypalplus/src/WC/PayPalPlusGateway.php(494): WCPayPalPlus\WC\PayPalPlusGateway->get_approval_url()
    #1 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/woo-paypalplus/src/WC/PayPalPlusGateway.php(481): WCPayPalPlus\WC\PayPalPlusGateway->form()
    #2 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/woocommerce/templates/checkout/payment-method.php(31): WCPayPalPlus\WC\PayPalPlusGateway->payment_fields()
    #3 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/woocommerce/includes/wc-core-functions.php(210): include('/opt/bitnami/ap...')
    #4 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/woocommerce/templates/checkout/payment.php(30): wc_get_template('checkout/paymen...', Array)
    #5 /opt/bitnami/apps/wordpress/htdocs/wp-content/plugins/woocommerce/includes/
    [20-08-2018 01:15:05] Inpsyde\Lib\PayPal\Core\PayPalHttpConnection : INFO: POST
    [20-08-2018 01:15:06] Inpsyde\Lib\PayPal\Core\PayPalHttpConnection : INFO: Response Status 	: 400
    [20-08-2018 01:15:06] Inpsyde\Lib\PayPal\Core\PayPalHttpConnection : ERROR: Got Http response code 400 when accessing {"name":"VALIDATION_ERROR","details":[{"field":"transactions[0].amount","issue":"Amount cannot be zero"}],"message":"Invalid request - see details","information_link":"","debug_id":"ea9c024ec74c"}

    Under no circumstances one plugin such as the paypal plus plugin should break the whole checkout page. Unfortunately, it is not the first time this happens with this plugin. 🙁

    Could you fix the issue by simply not showing the payment method instead of throwing the internal server error?


    P.S.: before the question comes up. I am using PHP in Version 7.0.21

Viewing 3 replies - 1 through 3 (of 3 total)
  • Plugin Author Andreas W.


    Hello @chr1s9r

    Do you have products with less than EUR 1,50 because you got this error

    {"issue":"Amount cannot be zero"}

    but this shouldn’t break your whole site. Can you please send a message to with your PayPal Plus log files, a screenshot of your PP+ setting and your WooCommerce status report?

    Thank you so much.

    Requested Data sent via Mail.

    As mentioned above we are talking about orders where a 100% voucher is applied, therefore the amount is equal to 0€.

    Plugin Author Andreas W.


    Hello @chr1s9r,

    I just replied to your ticket. In your PayPal log PayPal sent following message:

    {“name”:”VALIDATION_ERROR”,”details”:[{“field”:”transactions[0].amount”,”issue”:”Amount cannot be zero”}],”message”:”Invalid request

    PayPal will reject payments with an amount of zero, no matter if a user used a coupon or not. 0 as amount isn’t allowed.

    Please ask your Hosting Provider for a server error log file, so we can have a look at the 500 error message. Please send it to me via ticket system.

    Thank you so much.

Viewing 3 replies - 1 through 3 (of 3 total)
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