How to send WhatsApp DocuSign

I'm trying to send, to receive the envelope via WhatsApp. I'm using SDK, with version 3.16.1 of docusign-esign-java, I'm putting

additionalNotification.setSecondaryDeliveryMethod("WhatsApp")

however, I am receiving the following error:

EXError while requesting server, received a non successful HTTP code 400 with response Body: '{"errorCode":"ADDITIONAL_NOTIFICATION_CHANNEL_NOT_SUPPORTED","message":"The Additional Notification channel is not supported. Envelope definition should not have additional notification channel: WhatsApp for recip 1"}'

Solution

my account was not enabled to send whatsapp and it was also sending the wrong parameters.

correct json:

"signers": [
    {
        "phoneNumber": {
            "countryCode": "{SIGNER_PHONE_COUNTRY}",
            "number": "{SIGNER_PHONE_NUMBER}"
        },
        "name": "{SIGNER_NAME}",
        "recipientId": "1",
        "routingOrder": "1",
        "deliveryMethod": "WhatsApp"
"tabs": {
            "signHereTabs": [
                {
                    "anchorString": "**signature_1**",
                    "anchorUnits": "pixels",
                    "anchorXOffset": "20",
                    "anchorYOffset": "10"
                },
                {
                    "anchorString": "/sn1/",
                    "anchorUnits": "pixels",
                    "anchorXOffset": "20",
                    "anchorYOffset": "10"
                }
            ]
        }
    }
]