Rest API在Postman调用成功但C#中无返回数据问题排查

我用Postman直接粘贴带参数的URL调用接口能正常获取返回内容，但用C#（试过RestSharp和HttpClient）调用时，虽然返回200 OK状态，却拿不到任何数据。Node.js和ReactJS调用也有类似问题，只有Postman能拿到预期的application/javascript类型回调内容。

接口信息 #

接口地址：

https://citaconsular.es/onlinebookings/getwidgetconfigurations/?callback=jQuery21106986789352158271_1707334634680&type=default&publickey=2535680773512eb064e273253a3ba5037&lang=es&version=1246&src=https%3A%2F%2Fwww.citaconsular.es%2Fes%2Fhosteds%2Fwidgetdefault%2F2535680773512eb064e273253a3ba5037%23services&srvsrc=https%3A%2F%2Fcitaconsular.es&_=1707334634682

我的C#请求代码 #

private static void FindAppointmentss()
{
    try
    {
        var client = new RestClient("https://citaconsular.es");
        var request = new RestRequest("/onlinebookings/getservices/", Method.Get);
        request.AddQueryParameter("callback", "jQuery2110803503481037606_1707334189954");
        request.AddQueryParameter("type", "default");
        request.AddQueryParameter("publickey", "2535680773512eb064e273253a3ba5037");
        request.AddQueryParameter("lang", "es");
        request.AddQueryParameter("version", "1246");
        request.AddQueryParameter("src", "https%3A%2F%2Fwww.citaconsular.es%2Fes%2Fhosteds%2Fwidgetdefault%2F2535680773512eb064e273253a3ba5037%23services");
        request.AddQueryParameter("srvsrc", "https%3A%2F%2Fcitaconsular.es");
        request.AddQueryParameter("_", "1707334189957");
        request.AddHeader("Accept", "application/javascript");

        var response = client.Execute(request);

        if (response.IsSuccessful)
        {
            string content = response.Content;
        }
        else
        {
            Console.WriteLine("No data content: " + response.StatusCode);
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("Error: " + ex.Message);
    }
}

执行后始终输出No data content。

Postman正常返回的内容（application/javascript类型） #

jQuery21106986789352158271_1707334634680({
    "WidgetConfiguration": {
        "any_agenda": "2",
        "registration_type": "2",
        "waiting_list": "0",
        "show_comments": "0",
        "mandatory_comments": "0",
        "min_service_to_enable_dropdown": "0",
        "template": "1",
        "captcha": "0",
        "payment_enable": false,
        "payments_gateways": {
            "stripe": false,
            "paypal": false,
            "redsys": false,
            "niubiz": false
        }
    },
    "WidgetLabel": []
});

内容的提问来源于stack exchange，提问作者Jose Fdo