Thread:Project:Support desk/Unable to upgrade MediaWiki

I am trying to update my 1.16.1 MediaWiki Wiki to 1.16.5 at wiki.waesir.com through my SimpleScripts account install manager, but I am encountering this error:

"Server Configuration Error We have tried everything we could, but we can't seem to sync up with your web server. This could be DNS related or a Server Error, or perhaps you have a custom header (PHP or .htaccess) or are part of a "Cash for Domain Parking" program."

I don't do a cash for domain program, and I haven't altered any custom header to my knowledge. My webhost told me to rename .htaccess to .htaccess.old and try again, but the upgrade gave me the exact same error message.