Hello everyone!
I have been having an error in the res.users view when I created a new security group.
Instead of a form divided by goup categories i was getting a-kinda tree view of groups only.
If anybody had this problem I found that there is a method that calculated the category groups so that makes the res.users form to look 'normal' again.
groups = self.env['res.groups']
groups._update_user_groups_view()
self.env.cr.commit()
That way the view gets by category again
it might be helpful to somebody,
greetings