PayPal gateway has rejected request. Internal Error (#10001: Internal Error)

Question

I have an issue while accept the payment for an order in admin side. It shows the below error while accepting payment that is made using Paypal Standard, Paypal Payments pro.

PayPal gateway has rejected request. Internal Error (#10001: Internal Error)

How to fix this issue? Any assistance will be helpful...

Answer 1

I also received this error on testing Payments Pro in the sandbox. I sent a message to their support and got the following back:

Internal Service Error is usually caused by using a credit card number like 41111111111111111 etc, which has been used so many times in the past in Sandbox environment. I would advise you to try one of the Visa card numbers below:

4556852560405924 4532011208755443 4095054373873996 4716638504906094

I had used the 41111111111111111 Visa test card (PayPal's published list of test cards here - http://www.paypalobjects.com/en_US/vhelp/paypalmanager_help/credit_card_numbers.htm). Presumably they could see I'd tried to use that card number from looking through their logs.

Anyhow, in my situation, using the above numbers worked fine for me - with no other changes in Magento or in my PayPal account.