Can this notice message be fixed?

Im getting this warning when opening the customizer of the template I use, Matheson, in a new subsite.

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/user/public_html/wp-includes/functions.php on line 3547

As I have said all week, I know Notices can be ignored and I have already been warned about keeping Debug on but reporting these issues while developing seems to be the right thing to do. I have already set it up as child theme. Can you fix it?