API Credentials Are Correct
Thanks for your reply. The API credentials are correct. I absolutely know the difference between Live and Sandbox API Credentials. I am using Sandbox API Credentials not Live as I have an active PayPal Payments Pro Merchant account that is currently processing payments through another storefront using my Live API Credentials. I know the difference between the two logins: one for the Live PayPal and the other for the Sandbox.
I believe the issue in the endpoints according to the PayPal tech support. The URL is wrong and I believe that is part of the issue if not the entire issue.
Again, thanks for your reply. Hopefully I can get this resolved and I can complete my testing and take my online store live ASAP.