我用一个简单的Vue编写了以下代码.js应用程序.但是vue.js devtools没有响应.几天前它运行得很好，现在不再运行了，可能出什么问题了？当我到https://chrome.google.com/webstore/detail/vuejs-devtools/nhdogjmejiglipccpnnnanhbledajbpd，它说它已经被添加.
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<script src="https://unpkg.com/vue@2.1.6/dist/vue.js"></script>
<title>Document</title>
</head>
<body>
<div class="container">
<div id="application">
<input type="text" v-model="message">
<p>The value of the input is: {{ message }}</p>
</div>
</div>
<script>
let data = {
message: 'Hello World'
}
new Vue({
el: '#application',
data: data
})
</script>
</body>
</html>