调用接口：https://api.mch.weixin.qq.com/v3/fund-app/mch-transfer/transfer-bills

报错内容：Client error: `POST https://api.mch.weixin.qq.com/v3/fund-app/mch-transfer/transfer-bills` resulted in a `403 Forbidden` response

1. 小程序端支付是能正常使用
2. 使用wechatpay/wechatpay php版
3. 商家转帐功能已开通

这是提交的参数

$order = [
  "appid" => "wx****",
  "out_bill_no" => "plasdf12456",
  "transfer_scene_id" => "1005",
  "openid" => "on5S15FTWo9Mv3iu_cK1kGUsQeUE",
  "transfer_amount" => 100,
  "transfer_remark" => "测试转帐",
  "notify_url" => "https://xxxx.cn/wechat/transfer",
  "transfer_scene_report_infos" => array [
    0 => array [
      "info_type" => "岗位类型",
      "info_content" => "外卖员"
    ],
    1 => array [
      "info_type" => "报酬说明",
      "info_content" => "推广佣金提现"
    ]
];

$instance = Builder::factory([
    'mchid'      => $config["mch_id"], // 商户号
    'serial'     => $config["mch_serial"], //「商户API证书」的「证书序列号」
    'privateKey' => Rsa::from($config["ssl_key"], Rsa::KEY_TYPE_PRIVATE), // 商户API私钥
    'certs'      => [
        $config["pub_key_id"] => Rsa::from($config["public_key"], Rsa::KEY_TYPE_PUBLIC), // 微信公钥
    ],
]);

$resp = $instance->chain(“/v3/fund-app/mch-transfer/transfer-bills”)->post([
    'json' => $order,
    'headers'=>[
        'Wechatpay-Serial'=>$config["pub_key_id"]
    ]
]);