- CharlieAnswered on November 11, 2014 at 07:57 PM
It seems that this is a problem related to how your Paypal merchant account is configured.
If you have a screenshot of the error code please do share it with us, you can find more information and details about the error code on this page.
You may also check this forum post where it seems that one user had also the same error, http://www.jotform.com/answers/318347-PayPal-Invalid-merchant-configuration-error.
I hope this helps. Let us know if it works.