If you get a 404 error when accessing cPanel, this issue is likely caused by the cPanel (or webmail) port being blocked on your computer due to an ISP or Firewall setting. If you are unable to change the settings, proxy logins are available so that you can still access your cPanel.
The server sends as a result a "404" error, because the file or directory which you are calling, NOT exists in your hosting account, is incorrectly named, the path you are using is incorrect or has deleted the public_html directory.
