E00124: The provided access token is invalid. ADMINISTRATOR, ADD THIS TO THE integration_suggestions

[marine2026]

When using SANDBOX URL'S, posting testing transactions, refunds fail with this error code. 

integration_suggestions data for E00124 should include information that when using test URLs, the refundTransaction request fails.

{
    "createTransactionRequest": {
        "merchantAuthentication": {
            "name": "--",
            "transactionKey": "--"
        },
        "refId": "123456",
        "transactionRequest": {
            "transactionType": "refundTransaction",
            "amount": "5.00",
            "payment": {
                "creditCard": {
                    "cardNumber": "0015",
                    "expirationDate": "XXXX"
                }
            },
            "refTransId": "1234567890"
        }
    }
}