When I am logged in as keymaster, I get:

Notice: bbp_setup_current_user was called incorrectly. The current user is being initialized without using $wp->init(). Please see Debugging in WordPress for more information. (This message was added in version 2.3.) in /home/wp-includes/functions.php on line 3049

[@netweb Keymaster 10 years, 10 months ago]

See this https://bbpress.trac.wordpress.org/ticket/2412