What is causing our customers to be unable to make payment?

Richmond Strikers Soccer Club 

When going into register our customers are receiving "Error during Tranaction-Go back and fix this".  They are unable to make payment.

This is the first day we've had this problem.  We are using authorize.net and have confirmed with them that everything is find on their end.  When we checked to ensure that the API and ID's were correct, and checked the integration an error message of NULL was received.  This has never been received before.

What needs to be done to correct this problem?  

We deleted the payment and tried to enter the info again to see if that worked, but we received the same error message.  

Beverly Carrey

recreation@richmondstrikers.com

This was to an issue that we had earlier, but our developers has informed that it's fixed now. Could you please try again? 

Do let us know how it goes.