Leanplum +无法准备未定义的属性test2

Question

我正在研究leanplum，我只是按照他们的说明使用Javascript进行设置。

这是我的代码：

<script type="text/javascript" src="leanplum.min.js"></script>
    <script type="text/javascript" src="sw.min.js"></script>
    <script>
        // This value should be set to true only if you're developing on your server.
        var isDevelopmentMode = true;

        // Sample variables. This can be any JSON object.
        var variables = {
         items: {
           color: 'red',
           size: 20,
           showBadges: true
         },
         showAds: true
        };

        // We've inserted your Test API keys here for you :)
        if (isDevelopmentMode) {
         Leanplum.setAppIdForDevelopmentMode("xxx", "xxx");
        } else {
         Leanplum.setAppIdForProductionMode("xxx", "xxx");
        }

        Leanplum.setVariables(variables);
        Leanplum.start(function(success) {
         console.log('Success: ' + success);
         console.log('Variables', Leanplum.getVariables());
        });
    </script>

我收到此错误：

leanplum.min.js:1 Uncaught TypeError: Cannot read property 'test2' of undefined
    at leanplum.min.js:1
    at leanplum.min.js:1
    at Function.value (leanplum.min.js:1)
    at leanplum.min.js:1
    at leanplum.min.js:1
    at Function.value (leanplum.min.js:1)
    at Function.value (leanplum.min.js:1)
    at response (leanplum.min.js:2)
    at leanplum.min.js:1

我不知道此错误的原因是什么。有什么帮助吗？谢谢！