The model item passed into the dictionary is of type 'Castle.Proxies.HelloWorldPageProxy', but this dictionary requires a model item of type 'DxcAlloy

The model item passed into the dictionary is of type 'Castle.Proxies.HelloWorldPageProxy', but this dictionary requires a model item of type 'DxcAlloy.Models.ViewModels.IPageViewModel`1[DxcAlloy.Models.Pages.SitePageData]'.

i am trying to add a hello world page to alloy, but get he above error when i hit: http://localhost:60746/en/helloworld

Controllers/HelloWorldPageController.cs

namespace DxcAlloy.Controllers
{
    public class HelloWorldPageController:PageController<HelloWorldPage>
    {
        public ActionResult Index(HelloWorldPage currentPage)
        {
            return View(currentPage);
        }
    }
}

Models/Pages/HelloWorldPage.cs:

namespace DxcAlloy.Models.Pages
{
    [ContentType(DisplayName = "HelloWorldPage", GUID = "5e4176f9-613d-4c9e-9c85-37dd1d1d70d9", Description = "Hello World")]
    public class HelloWorldPage : PageData
    {
        [Display(
            GroupName = SystemTabNames.Content,
            Order = 10)]
        public virtual ContentArea ItemLiistContentArea { get; set; }
    }
}

Views/HelloWorldPage/index.cshtml

<div>
  Hello!</div>

Any ideas?