404 not found（HTTP返回代码，一种错误代码页）_百度百科 HTTP 404或404 Not Found错误消息是HTTP的其中一种“标准回应消息”（HTTP状态码），此消息代表客户端在浏览网页时，服务器无法正常提供消息。 通常是因为请求的URL对应的资源在服务器上未找到，可能是因为资源已被删除、移动或从未存在。
404 Page Not Found Error: Understanding and Resolving It - Lifewire A 404 error means the webpage you're looking for can't be found on the server You can fix a 404 error by checking the URL or refreshing the webpage If the page is moved, find it through search engines or contact the website directly