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PayPal eCommerce in Error Log

Claudia M

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I saw these errors in my log today.  What should I do?

[02-Apr-2022 10:16:28 America/Louisville] PHP Warning:  curl_error() expects parameter 1 to be resource, null given in /home/xxxxxx/public_html/modules/plugins/paypal_commerce/paypal.class.php on line 856
[02-Apr-2022 10:16:28 America/Louisville] PHP Warning:  Failed to update PayPal Commerce Order. Curl error:  in /home/xxxxxx/public_html/modules/plugins/paypal_commerce/paypal.class.php on line 856

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The Github issue #2914 is still open, so I added this observation to that issue.

However, why PayPal failed to update the order (patched) cannot be determined from these error messages.


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Here's what was in red for the same time. I've x'd out personal and other info.  An order for this customer did go thru but not for this amount (value) .

Request Sent (cURL) - https://api.paypal.com/v2/checkout/orders/xxxxxxx [{"op":"replace","path":"/purchase_units/@reference_id=='xxxxxxx'/amount","value":{"value":"13.93","currency_code":"USD"}},{"op":"replace","path":"/purchase_units/@reference_id=='xxxxx'/shipping/name","value":{"full_name":"xxxx xxxxx"}},{"op":"replace","path":"/purchase_units/@reference_id==xxxxxx'/shipping/address","value":{"address_line_1":"xxxxx xx","admin_area_1":"xx","admin_area_2":"xxxxx","postal_code":"xxxxx","country_code":"US"}}]

Error: cURL Error (22): The requested URL returned error: 422

Response received (422 - Unprocessable Entity)

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This is something that is incredibly unhelpful is the "422 - Unprocessable Entity" response. At least one of these key:value pairs is not agreeable to PayPal.

There is an open issue in the Github (#2896) that asks for a solution.

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In fact, there is code to show a 422 error's description, but it never gets executed.

While waiting for the module to get updated, we can try this fix:

In paypal.class.php, line 921, find:


On a new line after that, add:

trigger_error('Unprocessable entity reason: '.$value['description'], E_USER_WARNING);

Line 913, find this part of the statement:

array(200, 201, 202, 203, 204, 205, 206, 207, 208, 226))) {

Change that part to this part:

array(200, 201, 202, 203, 204, 205, 206, 207, 208, 226, 422))) {

This now should paint an error banner to the customer with the description of this problem, as well as now logging that description in CubeCart's System Error Log.



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