Classic Can't create Death Knight with Complete Hereoic Edition-Dad Question?

Asking this for my 6th grader. He just purchased the Complete Hereoic Edition. Description sounds like it's not a starter edition and should be able to create DK. Is it because the game isn't fully downloaded yet? Is there something else I am missing? Thanks for your help! via /r/wow https://ift.tt/2SxxYyS