Cant add new MenuSection in newer version of EpiServer

Hi, I experimented with MenuSection on the Alloy Demo running Epi v10.0.1

I Basically added a new folder under `modules/_protected`, with the current structure: 

Controllers/
Models/
Views/
Scripts/
Support/

In the controllers folder i got a HomeController.cs with the following code: 

    [MenuSection("/global/hello",Text = "Hello")]
    [Authorize(Roles = "Administrators,CmsAdmins,WebAdmins")]
    public class HomeController : Controller
    {
        [MenuItem("/global/hello/test", Text = "Test")]
        [HttpGet]
        public ActionResult Index()
        {
            var vm = new HomeViewModel();
            return View(Helper.ResolveView("Home/Index.cshtml"), vm);
        }
}

This works just fine - But when trying to do the same in Epi v10.4.3 - it doesnt work. 

I have tried looking trough the breaking changes, but i cant see that there should be anything. 

Using a menuprovider seems to work tho - but the examples just shows how to do it using aspx, so im unsure about what url to use as routing