I was trying to setup the payment method with paypal. I got everything setup correctly with PayPal information. Then when I try to see if everything was working and I get this message:

We are sorry for the inconvenience. The PayPal account authentication settings are not yet set up, or the API security information is incorrect. We are unable to complete your transaction. Please notify the store owner so they can correct this problem. (10002) 10002 Security error - Security header is not valid

Couldn't go any further.

Wade Morris