You will see the HTTP 404 error when your website is unable to retrieve the file/folder that the user has requested. There are two main reasons why this error can occur:
The content requested does not exist
- This means that the file or folder that the user has requested via their web browser doesn't exist or has been moved to another location. If there are no redirects in use, the request will fail to retrieve the specified data.
SEO/SEF links are not enabled
- This usually means that the customers who have Content Management Systems (CMS), such as Joomla or WordPress, are not displaying the requested data. This can normally be resolved by checking the .htaccess file within your web hosting account. supplied by the software.