How to render an ErrorView, without FallbackController?

Questions & Help Questions
,
1

Trying to render an error view:

 # in a controller

  def test1(conn, params) do
    case Repo.get_by(MyModel, title: params["title"]) do
      nil ->
        put_status(conn, 403)
        |> put_layout(false)
        |> render(MyAppWeb.ErrorView, "404.html")


# in the config:

debug_errors: false,

Output:

Internal server error

Why? No idea.

And a 2nd question: How can render an error html template with no layout without having to say put_layout(false) from a controller? Namely, I want to set “nil” layout from within ErrorView.