@Wolftank Refer to User Guide there is no Operator anymore. You can only give it Administrator role.

Administrator: This role has permissions to adopt and/or manage devices of the sites chosen in the site privileges, edit itself, create/edit/delete viewer accounts in its privileged sites. However, it cannot delete itself or edit/delete master administrator and other administrator accounts.

Viewer: This role can view the information of the sites chosen in the site privileges. It can only edit itself.