Payment error: LongMessage: Security header is not valid ShortMessage: Security error ErrorCode: 10002
I see several threads about this error from two years ago, here, but nothing recently.
The causes I saw had to do mostly with the sandbox option being checked, or using paypal express.
I am using PaypalDirect and and I do not have sandbox checked.
If you guys have a quick thing or two to try, awesome... if this requires more, I'm willing to pay, because we are trying to launch ASAP.
It seems like there may be something within Paypal I need to do, but the directions within nopCommerce no longer exactly match PayPal's UI, so I'm having a hard time trackign down this issue.