3
in case any one else has this problem, when you get that message, it means that the correct module hasn't been installed yet.
Since profiles are necessary, the usermanagement module must be installed. I tried to install it later, and still got some problems, I don't think my profile was created correctly.
Maybe the XOOPS developers should make you install it when you install Xoops... Kind of like the system module. Because if it's not installed, apparently it causes problems.