To fix this error, please reach out to your Account Manager with the details of the issue, they will assist you in enabling the required API version.

An authentication failure typically indicates an issue with your keys. Please ensure that the AuthKey and AuthIV provided by your Account Manager are passed accurate and valid.

If you’re having trouble displaying the response, please verify that the correct URL is set in the callback URL parameter to ensure proper rendering.

For issues related to the Transaction Enquiry API, ensure that all mandatory parameters are correctly passed and verify that the encryption and decryption methods are implemented properly.

For any problems with encryption or decryption, please refer to the AES-128 logic as specified in the reference code provided for your platform.

For issues with the Refund API, please contact your Account Manager for the required documentation and assistance.

If you receive this error, check that the payer name is correctly formatted and free of special characters.

If you see this message, please double-check that all parameters are correct and ensure you’re using the correct OnlyStac request URL.

For transaction-related issues, please write to support@onlystac.in and we’ll assist you in resolving the matter.