iPower: The server encountered an unexpected condition which prevented it from fulfilling the request.
If you’re getting this error on iPower you need to enable CGI / scripts. Sometimes your account will show you that this is enabled, even if it is not. Contact iPower support to get them to resolve it for you.
Even if in your control panel homepage CGI / PHP is showing up as active, click on the server configuration tab and you probably will see that CGI is in fact inactive:
