Olivier,
I see the issue that you are having. This is a bug. You can create roles but the field to assign them to members is not appearing. Not sure why. We need to open this as a reported bug and look into it.
It should work as follows.
Roles allow you to control user access to tag profiles.
Roles are set up as a hierarchy of users. The roles specifically control which tag profiles each user can see based on the role they are assigned to.
Roles are set up as basic groups. When you mark an entry as private to a specific role
then users with this role have access to the tag profile. Users who are not assigned that role will not be able to search or access the tag profile.
You create roles through the menu bar by clicking on Members.
Once you click on members there are two tabs. A members tab and a roles tab.
You first create roles. This is very simple. Click on the roles tab and then click the 'Add New' button. Then provide a name and description for the new role that you are creating. There is a small naming that we need to clean up. The roles name incorrectly says 'Tag Profile Name' and should say 'Roles Name'.
Once the role is created you can now go back to the Members tab and add a new user and assign them to a specific role. Users can be assigned to multiple roles. The roles are managed through the members file menu.
Thanks for noting this as something has changed between version releases and this feature is not working.
Jumper team.