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Error Response 3 with Reason Code 21

I have a Sandbox account setup that was working fine all up until randomly on this past Friday I started to get an error code of 3 with a response code of 21.

 

This website says:

 

An error occurred during processing. Please try again in 5 minutes.

 

Now 3 days later, I'm still getting this same response.

 

Any clues of what would cause my Sandbox to randomly stop working?

kitaryan
Member
2 REPLIES 2

Which API? what CC info are you using for testing?

RaynorC1emen7
Expert

PHP, using AIM. 

 

Card info:

 

Visa 4111111111111111