Something is wrong with my PayPal button. Customers getting error saying "PayPal Payment Pro error: Security error Security header is not valid" I dont even have PayPal Payment Pro! I only use PayPal Express.
Just started a couple of days ago. I have not made any changes to this paypal link for years.
Sorry I don't fully understand. Is this something to do on ECT or on PayPal? Are your referring to setting up an API? I have email address filled in API Method: API Certificate Transaction Type : Sale
No other info filled in. Do I have to select the "API credentials for payments and post-checkout operations (Can be set up later)" If so where are the instructions for that?
Hi the 2 Paypal services work together and will need API information setup information is here https://www.ecommercetemplates.com/phphelp/ecommplus/paypal-pro.asp
quote:I dont even have PayPal Payment Pro! I only use PayPal Express.
If you do not want to setup the API which is easy then you can use Paypal Standard setup is here https://www.ecommercetemplates.com/phphelp/ecommplus/paypal.asp
OK I changed it from certificate to signature and found the API area on my paypal account under Account Settings/API settings/NVP/SOAP API integration (classic)/Manage API settings. And resolved the issue successfully.