Docsify plugin error ReferenceError: gitalk is not defined

[MJ-Zeng]

Code：

<script>
    window.$docsify = {
      name: 'Code Wiki',
      repo: 'https://github.com/MJ-Zeng/Code-Wiki',
      auto2top: true,
      autoHeader: true,
      loadSidebar: true,
      subMaxLevel: 5,
      search: {
        noData: {
          '/': '😒 找不到结果'
        },
        paths: 'auto',
        placeholder: {
          '/': '🔍 搜索'
        }
      },
      // 访问统计
      busuanzi: true,
      // 评论
      gitalk: {
        clientID: 'Ov23li7QqtpSj2xYPnAa',
        clientSecret: '340bf5f148779f034e17eb0949389d23396bfc94',
        repo: 'Code-Wiki-Talk',
        owner: 'MJ-Zeng',
        // admin: ['MJ-Zeng'],
        id: location.pathname,
        distractionFreeMode: false, // 是否启用无干扰模式
        language: 'zh-CN' // 设置评论区的语言
      },


    };
  </script>
  <!-- <script src="//unpkg.com/docsify/lib/docsify.min.js"></script> -->

  <!-- Docsify v4 -->
  <script src="//cdn.jsdelivr.net/npm/docsify@4"></script>

  <!-- GitTalk评论 -->
  <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/gitalk/dist/gitalk.css">
  <script src="//cdn.jsdelivr.net/npm/docsify/lib/plugins/gitalk.min.js"></script>
  <script src="//cdn.jsdelivr.net/npm/gitalk/dist/gitalk.min.js"></script>
  <script src="https://unpkg.com/docsify-gitalk@1.0.0/dist/docsify-gitalk.min.js"></script>

ISSUE