# gateway.general.unknown

> For the complete machine-readable documentation index, see [llms.txt](https://apidocs.chargebee.com/llms.txt).


**gateway**

The payment failed due to an unknown or unclassified error from the payment gateway. This occurs when the gateway returns an error without a detailed explanation, an unhandled exception occurs during processing, or third-party systems experience temporary issues.

## Recommended Customer Message

Your payment could not be completed at this time. Please try again later or use a different payment method. If the issue persists, contact your bank for more information.

## Root Cause[](#root-cause)

-   **Unclassified error:** The gateway returned an unspecified error without a detailed explanation.
-   **Unexpected system behavior:** An unhandled exception or unknown failure occurred during transaction processing.
-   **Third-party integration issues:** External systems involved in payment processing might be experiencing downtime or instability.

## Troubleshooting and Solutions[](#troubleshooting-and-solutions)

-   Advise the customer to retry the transaction after some time, as the issue may be temporary.
-   Recommend using an alternative payment method to complete the transaction.
-   Review transaction logs and API responses to check for any hidden error patterns or failures.
-   Contact the payment gateway support team for clarification and assistance in identifying the root cause of the unknown error.