<!-- Global site tag (gtag.js) - Google Analytics -->

<script async src="https://www.googletagmanager.com/gtag/js?id=UA-XXXXXXX-1">

</script>

<script>

  window.dataLayer = window.dataLayer || [];

  function gtag(){dataLayer.push(arguments);}

  gtag('js', new Date());

  gtag('config', 'UA-XXXXXXX-1');

</script>

如果将以上代码添加在Head内，更新模板缓存后，页面不显示，看了网页源代码，只显示到

<!-- Global site tag (gtag.js) - Google Analytics -->

<script async src="https://www.googletagmanager.com/gtag/js?id=UA-XXXXXXX-1">

</script>

<script>

<br/> window.dataLayer = window.dataLayer || [];
function gtag()
以下开始空白。请问，谁知道是什么原因？