| 10002 | Authentication/Authorization Failed | Username/Password is incorrect | This error can be caused by an incorrect API username, an incorrect API password, or an invalid API signature. Make sure that all three of these values are correct. For your security, PayPal does not report exactly which of these three values might be in error. |
| 10501 | Invalid Configuration | This transaction cannot be processed due to an invalid merchant configuration. | Occurs when the billing agreement is disabled or inactive. |
| 10548 | Invalid Configuration | This transaction cannot be processed. The merchant’s account is not able to process transactions. | The merchant account attempting the transaction is not a business account at PayPal. Check your account settings. |
| 15008 | Invalid Data | This transaction has been completed, but the total of items in the cart did not match the total of all items. | |
PayPal Error Codes
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