The 404 error indicates that a file doesn’t exist in the Web server. There are other causes like .htaccess configurations or wrong redirects that may apply. Check the spelling of the file which you have directed in your hosting page. You must store the files inside the public_html folder using FTP. It’s a simple error, these steps would usually solve the problem.
This error is known as page not found error. It might be because of wrong address pointed by the domain name. Your domain provider might help you to configure your settings. Contact their customer service team.