Whenever I try to upload the sitemap_index.xml file to Google Webmaster Tools it comes back with an error that says:
We encountered an error while trying to access your Sitemap. Please ensure your Sitemap follows our guidelines and can be accessed at the location you provided and then resubmit.
General HTTP error: 404 not found
HTTP Error: 404
I don't have W3 Total Cache Plugin.. Any other reason why this is happening?