Incidentally, as you can see, they both have the same notice, despite that article stating they had fixed in the mysterious version 2.4
WP 4.1.1
BBP 2.5.6
BP 2.2.1 (not 2.4, that doesn’t seem to exist)
Thanks for your response.
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.)