# gateway.transaction_processing.invalid_config

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


**gateway**

The payment failed due to an invalid configuration in your account or payment gateway settings. This can include incorrect API credentials, disabled payment methods, environment mismatches, or integration errors.

## Recommended Customer Message

We are unable to process the transaction. Kindly ensure that your payment gateway settings are correctly configured. For further assistance, kindly reach out to Merchant Service Provider

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

-   **Incorrect merchant account configuration:** Essential settings (such as API keys, credentials, or gateway rules) are missing or misconfigured.
-   **Disabled payment methods:** The requested payment method is not enabled in the gateway configuration.
-   **Environment mismatch:** A transaction is being sent to the wrong environment (e.g., production credentials used in sandbox).
-   **Gateway integration errors:** The integration code is passing unsupported or invalid parameters based on the current setup.

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

-   Review the payment gateway configuration in your system or admin console.
-   Verify credentials, environment (test vs. live), payment method enablement, and webhook URLs.
-   Check the gateway documentation for any mandatory fields or setup steps you might have missed.
-   Ask the customer to retry the transaction once the configuration is corrected.
-   Contact Chargebee Support if the problem persists despite correct inputs.
-   If needed, contact the payment gateway or the Merchant Service Provider for assistance in resolving the misconfiguration.