Group Invite Not Working

I have just installed version 1.7 and am unable to send invites to friends to join any group.  Is there a specific configuration to be done for this to work or should it work out of the box?

 

Here is a snippet of he http error log.

 

foreach()" in file /var/www/html/mod/custom_index/views/default/canvas/layouts/new_index.php (line 92)
[Wed Apr 28 07:32:22 2010] [error] [client 10.2.135.35] WARNING: 2010-04-28 08:32:22 (CEST): "Invalid argument supplied for foreach()" in file /var/www/html/mod/custom_index/views/default/canvas/layouts/new_index.php (line 92)
[Wed Apr 28 07:34:35 2010] [error] [client 10.2.135.35] WARNING: 2010-04-28 08:34:35 (CEST): "Invalid argument supplied for foreach()" in file /var/www/html/mod/riverdashboard/views/default/riverdashboard/newestmembers.php (line 22), referer: http://buzz.afdb.org/pg/dashboard/

Thanks in advance.