He says that the credentials are wrong, but as you can see in the images, everything is correct. I also installed the certificate in the Postman program and nothing works.
I'm happy to help you resolve the issue your experiencing. Please navigate to the Visa Developer Codes page for error cause and resolution here - https://developer.visa.com/pages/visa-developer-error-codes
If the error persists, please provide the information below:
1. Endpoint 2. Request Header3. Request Body4. Response Header (include the x-correlation-id)5. Response Body
Using SoapUI, you can find the x-correlation-id in the Raw Tab of the response header.