On tring to load a MVC modue created by using the mvc module template provided by DNN Christoc, it show error below:

Error: ATest01 is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Web.Mvc.Framework.ModuleDelegatingViewEngine.RunAgainstModuleViewEngines(ControllerContext controllerContext, Func`2 engineRequest) at System.Web.Mvc.ViewEngineCollection.<>c__DisplayClass6.<FindView>b__4(IViewEngine e) at System.Web.Mvc.ViewEngineCollection.Find(Func`2 lookup, Boolean trackSearchedPaths) at System.Web.Mvc.ViewEngineCollection.FindView(ControllerContext controllerContext, String viewName, String masterName) at DotNetNuke.Web.Mvc.Framework.ActionResults.DnnViewResult.ExecuteResult(ControllerContext context, TextWriter writer) at DotNetNuke.Web.Mvc.MvcHostControl.RenderModule(ModuleRequestResult moduleResult) at DotNetNuke.Web.Mvc.MvcHostControl.OnLoad(EventArgs e) --- End of inner exception stack trace ---

I use VS2015, DNN 8.01

the Server is Win2012 and DB server is SQL server 2012 Express.

Does anyone knows the solution?

Thanks.