Pro sites causing warning

when i go to
i receive the following and the rest of the page does not load.

Notice: Undefined property: WP_Query::$post in /home/financia/public_html/wp-includes/query.php on line 3017

Warning: Cannot modify header information - headers already sent by (output started at /home/financia/public_html/wp-includes/query.php:3017) in /home/financia/public_html/wp-includes/pluggable.php on line 876

When I visit the page without www it works. Also, when I deactivate the Pro Sites plugin the www works fine.