Paypal Invalid Merchant Configuration sandbox error

Question

I am using paypal pro in sandbox. when I send the request and in response I get this error:

Array ( [TIMESTAMP] => 2010%2d11%2d23T09%3a21%3a12Z [CORRELATIONI

Answer 1

I had this problem when I was using the default Business sandbox account that exists when you set up the PayPal developer account. When I created a new business account everything worked.

Also, be sure to use a personal sandbox account that you set to test against your business sandbox account.