Genie tutorial authentication redirection fail

[ghost]

I am following the Genie tutorial: https://www.genieframework.com/docs/genie/tutorials/Developing-MVC-Web-Apps.html
I have got to the 'Bonus' section, for implementing authentication.
Have created a user table using SearchLite and created an admin user.

routes.jl:
using Genie.Router, MoviesController, AdminController

route("/") do
serve_static_file("welcome.html")
end

route("/movies", MoviesController.index)
route("/movies/search", MoviesController.search, named = :search_movies)
route("/admin/movies", AdminController.index, named = :get_home)

AdminController:
module AdminController

using GenieAuthentication, Genie.Renderer, Genie.Exceptions, Genie.Renderer.Html

function index()
@authenticated!
h1("Welcome Admin") |> html
end

end

Browse to: http://127.0.0.1:8000/admin/movies
I expect to be challenged for credentials.
What I see is a blank screen, except for 'Redirecting you to'

Julia version: 1.7.3
Genie version: 4.18.1
Genie Authentication version 1.2.0