1, which may be the problem of the webpage itself. That is, the problem of the server. At present, many website pages are encoded by some templates, and not all js(javascript) scripts of the original template are necessarily used. Plus the designer's level or negligence. Therefore, the js object cannot be found on the page. It will show that there is something wrong with the web page.
2. It may be the computer itself. Such as the version of the browser. Or his page needs some plug-ins or components. And your computer is not installed or blocked.