This error message appears when the authorizer rejects a payment in the bank portal but does not enter the reason for rejection.
Solution: In the e-Payments report, mark the transactions as not applicable and make the necessary changes for the transactions. Reset the status of the transactions and send them to the bank again. Next time when you need to reject a transaction, provide a reason in the bank portal to avoid getting the error message.
This error appears either because the bank server is not responding or the connection to the bank server is timed out.
Solution: Re-send payment instructions to the bank after some time.