The user profile area allows you to tell the system who you are, what kind of user you are (i.e. a lecturer, a researcher etc.) and to associate an email address which can be used for notifications.
More importantly, you need to create your profile before you can make yourself the owner of a list.
When you log into RLO, click on the link to Create a Profile and complete the form.
If your a profile is not set as public, then it will only be visible to logged-in Administrative users.