If a user wants to purchase an upgrade for the tenant, they must be assigned the buyer role.
If no user has the buyer role assigned, then any user attempting to purchase an upgrade will receive a message "No Buyer entitled for this tenant". If a tenant admin attempts to add the buyer role to them self or other users, they might not see the buyer role in the settings application. Then they should follow the instructions below.
Solution
To assign the buyer role to a user you first must edit the role assignment of your tenant. Here are the steps to proceed:
If you do not see the buyer role in the roles list:
Notes
Settings application documentation.
User rights in the upgrade application.