Hello there, hope you are doing well.

I am trying to mark incoming messages as seen using the sender_action and Instagram Messenger API, however, I'm getting the unknown sender_action error even tho I am sending the parameters correctly as described in the Send API(https://developers.facebook.com/docs/messenger-platform/reference/send-api/).

{
    "recipient": {
        "id": "1005912531044343"
    },
    "sender_action": "mark_seen"
}

{
    "error": {
        "message": "(#100) Invalid sender action data",
        "type": "OAuthException",
        "code": 100,
        "error_subcode": 2534019,
        "fbtrace_id": "A1pT_RzowJbCb80VWz7R9yr"
    }
}