Hi @Joseph welcome to the forums!
First, it looks like you just shared a real card rather than a test value, so I strongly urge you to contact your bank and have the number changed immediately as this has been public for some time, and possibly cached.
Further more, I’m not seeing any logs for that particular sandbox application id around payments (I see one or two requests about ListLocations and that’s it). Can you share exactly what you’re calling and how you’re setting the credentials (with the credentials redacted)?