I am using zencart and using authorize.net for one of my payment module, So customers can pay directly through credit card. I have a authorize.net sandbox account. Last night I test it and everything was fine. But now when we test in sandbox mode, an error occurred and it says -
"An error occurred during processing. Please try again. - Your credit card could not be authorized for this reason."
I search in google and know that the error code is E00001 .
I just want to know why this is happen? what is the type of error and which file is responsible? and why this error comes up in testing mode? Please help me
