Logout problem BuddyPress Frisco BUddyPressTheme

I get this http://mydomain.com/wp-login.php?action=logout&_wpnonce=%5Bcode%5D with a blank page whenever I tried to logout from backend. I'm trying to build a community blog with BuddyPress and Frisco theme.

Apparently, I'm not logout of backend. I've searched the forum for similar cases but found none similar to mine. Most are on WP theme which I can't find anything similar to the BuddyPress theme I'm using so I can't do much to the core files.

This is my first time using BuddyPress.