Authentication/Authorization Failed: You do not have permissions to make this API call

This is the error message when I try to pay via paypal. I have a business paypal account and the API is entered correctly, as I assume.

I just followed your instructions, but it seems not to work.

Any ideas?

Cheers,
Tajo

Hi Tajo!

Thank you for letting us know about this!

If you are using PayPal Express checkout, please check the API username, password and signature and see if they are correct. Also Make sure you are using correct API data for correct payment option (sandbox or production).

In case everything is set up correctly, the Authentication API's need to be enabled from your PayPal account before you can use them.
Thanks! Have a great day!