ON THE PAYPAL SITE THIS QUESTION HAS NOT BEEN ANSWERED, BUT AS I HAVE THE SAME ISSUE, I POST IT HERE. THANKS:
Hi there,
I'm using Express Checkout to access the Paypal Sandbox. I use the correct API credentials. Still, when I do the "SetExpressCheckout" with cURL, the request fails.
The answer I get does not contain ['ACK'] as it is supposed to, It contains HTML code that tells me to login into my sandbox account. But I am logged in with that account (it's my only account, there can't be any confusion).
When I use the productive paypal site and not the sandbox, I get an empty result from the call to "SetExpressCheckout".
Can anyone help me with that?
Cheers!