I like what this extension offers and am looking forward to using it. However, I get this error after installing:

Warning: Invalid argument supplied for foreach() in /home/content/s/a/f/safarep1/html/components/com_userlist/userlist.html.php on line 74

I'm using J1.5.x w/ legacy mode on and UserList v2.5. Any suggestions?
Thanks Emir.