Hello dear,

the white page means that an error is going on server at PHP level.
Often this is caused by bugged plugins when dealing with XML documents in Joomla. You can check if the plugin 'Easyscripts' is installed, in this case it's likely the responsible of the error.

Contact me at This e-mail address is being protected from spam bots, you need JavaScript enabled to view it providing an admin account to get a quick help and fix on your site if needed.

Before submitting the sitemap to Google Webmasters we have to fix this error.

All the best

John