Please contact your account administrator Grif or MethodSupport to gain access.
Account administrator can give access by going to the right-menu > Subscriptions area.
I got this error trying to edit an email template even though I am the administrator. Thought I should let you know it has happened to me several times in the last couple days when adding or editing in other areas as well
I have been logging out and back in & going to another app and coming back to get around it.