无法将Amazon lex集成到我的网站中

我已经开发了一个aws lex chatbot。现在,我想在我的网站上集成EC2实例,使用预构建的UI组件库作为可嵌入的iframe,该iframe已在github中提供。以下是指向它的链接: https://github.com/aws-samples/aws-lex-web-ui#iframe .下面是github中iframe的代码:

<html>
  <head>
    <title>My Parent Page</title>
  </head>
  <body>
    <h1>Welcome to my parent page</h1>
    <!-- loader script -->
    <script src="./lex-web-ui-loader.js"></script>
    <script>
      /*
        The loader library creates a global object named ChatBotUiLoader
        It includes the IframeLoader constructor
        An instance of IframeLoader has the load function which kicks off
        the load process
      */

      // options for the loader constructor
      var loaderOptions = {
        // you can put the chatbot UI config in a JSON file
        configUrl: './chatbot-ui-loader-config.json',

        // the full page chatbot UI that will be iframed
        iframeSrcPath: './chatbot-index.html#/?lexWebUiEmbed=true'
      };

      // The following statement instantiates the IframeLoader
      var iframeLoader = new ChatBotUiLoader.IframeLoader(loaderOptions);

      // chatbot UI config
      // The loader can also obtain these values from other sources such
      // as a JSON file or events. The configUrl variable in the
      // loaderOptions above can be used to put these config values in a file
      // instead of explicitly passing it as an argument.
      var chatbotUiConfig = {
        ui: {
          // origin of the parent site where you are including the chatbot UI
          // set to window.location.origin since hosting on same site
          parentOrigin: window.location.origin,
        },
        iframe: {
          // origin hosting the HTML file that will be embedded in the iframe
          // set to window.location.origin since hosting on same site
          iframeOrigin: window.location.origin,
        },
        cognito: {
          // Your Cognito Pool Id - this is required to provide AWS credentials
          poolId: xxx
        },
        lex: {
          // Lex Bot Name in your account
          botName: yyy
        }
      };

      // Call the load function which returns a promise that is resolved
      // once the component is loaded or is rejected if there is an error
      iframeLoader.load(chatbotUiConfig)
        .then(function () {
          console.log('iframe loaded');
        })
        .catch(function (err) {
          console.error(err);
        });
    </script>
  </body>
</html>

cd /var/www/html    
ls
index.html lex-web-ui(github folder)