Root Cause

• Incorrect request parameters: The required fields are missing, invalid, or in an invalid format in the API or payment request.

• Unsupported payment method or transaction type: The request attempted to use a payment method or transaction feature not supported by the gateway.

• Invalid resource identifiers: The request referenced an incorrect identifier (e.g., invalid customer ID, payment method ID).

• Malformed API request: The structure of the API call does not match the expected schema defined by the payment gateway.

Troubleshooting and Solutions

• Review the API documentation or integration guidelines to ensure all required parameters are correctly included and properly formatted.

• Check if all the required parameters are being collected during the checkout process and passed on to Chargebee / Payment gateway.

• Contact support@chargebee.com if you need to validate this within Chargebee's integration with the payment gateways.