How to remove Sub Nav Items in BuddyPress

I have tried a variety of ways using bp_core_remove_nav_item(){} to remove the Send Invites menu item in a plug-in and in my theme’s functions.php file and I either get no success in removing certain menu items or I get a Page not found result.

Does anyone know how to effectively remove sub nav menu items in Buddypress?

Thanks

This does not work in my functions.php:
function bbg_remove_send_invites_from_group() { bp_core_remove_nav_item( bp_get_current_group_slug(), 'send-invites' ); } add_action( 'bp_setup_nav', 'bbg_remove_send_invites_from_group' );

This does not work within a plugin:
function bbg_remove_send_invites_from_group() { bp_core_remove_nav_item( bp_get_current_group_slug(), 'send-invites' ); } add_action( 'bp_setup_nav', 'bbg_remove_send_invites_from_group' );