PayPal’s documentation for their error code 10002 states: “This error can be caused by an incorrect API username, an incorrect API password, or an invalid API signature. You can 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.”
Also, PayPal has different types of API credentials. You need to use the ones that work with PayPal Express. You can locate your PayPal Express API credentials by following the steps in the documentation:
The support post ‘Security Error 10002’ is closed to new replies.
Have a question about this support post? Create a new support post in our support forums and include a link to this existing support post so we can help you.
Support forum for Event Espresso 3 and Event Espresso 4.