Hi there-
I followed the instructions to set up the API credentials and copy/pasted them into the payment settings. However, once you go to check out, you get this message:
There was a problem connecting to PayPal to setup your purchase. Please try again.
10002 - Security error - Security header is not valid
I've verified the API information again, etc. I don't know what to do. Can anyone help?
Thanks and best wishes,
Kristen