Javascript reCAPTCHA v3 vb.net未捕获（承诺中）null

我正在尝试向VB.net页面添加验证码。唯一的解释是无结果（承诺）无效？我在脚本中添加了一个标签，但它不在页面上，错误消失了，但仍然不起作用？顺便说一句，如果我不检查，我确实会收到“你是机器人吗”消息，但如果我检查，它只会重新加载页面，而不会继续按钮单击事件中的代码

我的代码：
脚本：

var your_site_key = 'xxxxxxxxxxxxxxxxxx';
    var renderRecaptcha = function () {
        grecaptcha.render('ReCaptchContainer', {
            'sitekey': 'xxxxxxxxxxxxxxxxxx',
            'callback': reCaptchaCallback,
            theme: 'light', //light or dark
            type: 'image',// image or audio
            size: 'normal'//normal or compact
        });
    };
    var reCaptchaCallback = function (response) {
        if (response !== '') {
            document.getElementById('lblMessage1').innerHTML = "";
        }
    };

设计视图：

<div id="ReCaptchContainer"></div>
<br/><asp:Label ID="lblMessage1" runat="server" />

功能：

    Public Function IsReCaptchValid() As Boolean
    Dim result = False
    Dim captchaResponse  = "g-recaptcha-response"
    Dim secretKey = "xxxxxxxxxxxxxxxxxxx"
    Dim apiUrl = "https://www.google.com/recaptcha/api/siteverify?secret={0}&response={1}"
    Dim requestUri = String.Format(apiUrl, secretKey, captchaResponse)
    Dim request = CType(WebRequest.Create(requestUri), HttpWebRequest)

    Using response As WebResponse = request.GetResponse()

        Using stream As StreamReader = New StreamReader(response.GetResponseStream())
            Dim jResponse As JObject = JObject.Parse(stream.ReadToEnd())
            Dim isSuccess = jResponse.Value(Of Boolean)("success")
            result = If((isSuccess), True, False)
        End Using
    End Using

    Return result
End Function

    Public Function IsReCaptchValid() As Boolean
    Dim result = False
    Dim captchaResponse  = "g-recaptcha-response"
    Dim secretKey = "xxxxxxxxxxxxxxxxxxx"
    Dim apiUrl = "https://www.google.com/recaptcha/api/siteverify?secret={0}&response={1}"
    Dim requestUri = String.Format(apiUrl, secretKey, captchaResponse)
    Dim request = CType(WebRequest.Create(requestUri), HttpWebRequest)

    Using response As WebResponse = request.GetResponse()

        Using stream As StreamReader = New StreamReader(response.GetResponseStream())
            Dim jResponse As JObject = JObject.Parse(stream.ReadToEnd())
            Dim isSuccess = jResponse.Value(Of Boolean)("success")
            result = If((isSuccess), True, False)
        End Using
    End Using

    Return result
End Function