In Arcgis Online, when trying to invite new members to our organization I get an error that states insufficient user types available. Is this because you have to purchase subscriptions in order to invite the new members? In other words, if I wanted to add 5 people to our organization I would have to buy 5 licenses for them to viewers, publishers, etc? Is there something else that is causing the issue. I have the role of creator but all administrative privileges.