hello.
I'm using PortOne, a Korea PG hosting company, and the billing key issuance and payment using the billing key worked well in the sandbox environment, so I tried to issue the billing key in the live environment, but I'm getting a TRASACTION_REFUSED error. What should I do if this error occurs? Below is the URL that is displayed in the PayPal popup when issuing a billing key.
https://www.paypal.com/checkoutweb/genericError?code=VFJBTlNBQ1RJT05fUkVGVVNFRA%3D%3D&cancelLink=(Om...
