企业微信URL回调未响应请求如何解决

在官方测试回调接口的结果如下，显示request成功

在应用设置回调URL显示校验未响应请求

**附上callbackverify.php代码
**

<?php
require_once "WXBizMsgCrypt.php";

define('EncodingAesKey',"xxx");
define('Token', "xxx");
define('CorpId', "xxx");

$wechatObj = new WXBizMsgCrypt(Token, EncodingAesKey, CorpId);


if (!isset($_GET['echostr'])) {
    echo "没有进入到回调配置！";
} else {
    //接受验证数据
    $sVerifyMsgSig = $_GET["msg_signature"];
    $sVerifyTimeStamp = $_GET["timestamp"];
    $sVerifyNonce = $_GET["nonce"];
    $sVerifyEchoStr = $_GET["echostr"];
    $sEchoStr = "";

    $errCode = $wechatObj->VerifyURL($sVerifyMsgSig, $sVerifyTimeStamp, $sVerifyNonce, $sVerifyEchoStr, $sEchoStr);

    //回调验证判断
    if ($errCode == 0) {
        echo $sEchoStr;
    } else {
        print("ERR: " . $errCode . "\n\n");
    }
}
?>

用了内网穿透的方法

页面上应该有验证回调接口的按钮把，能访问通吗？