Image not rendered on DXA site

Question

i have setup demo DXA site everything looks fine but carousel and image are not rendered on site it shows message "A problem occurred while rendering this seection". i have set image publishing in broker

System.NullReferenceException: Object reference not set to an instance of an object. at Sdl.Web.Tridion.Context.ContextEngine..ctor() at Sdl.Web.Mvc.Configuration.WebRequestContext.get_ContextEngine() at Sdl.Web.Mvc.Configuration.WebRequestContext.CalculateScreenWidth() at Sdl.Web.Mvc.Configuration.WebRequestContext.get_ScreenWidth() at ASP._Page_Areas_Core_Views_Entity_Partials_Teaser_ImageOverlay_cshtml.Execute() in c:\inetpub\wwwroot\DXASite\Areas\Core\Views\Entity\Partials\Teaser-ImageOverlay.cshtml:line 8 at System.Web.WebPages.WebPageBase.ExecutePageHierarchy() at System.Web.Mvc.WebViewPage.ExecutePageHierarchy() at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData) at ASP._Page_Areas_Core_Views_Entity_Carousel_cshtml.Execute() in c:\inetpub\wwwroot\DXASite\Areas\Core\Views\Entity\Carousel.cshtml:line 20 at System.Web.WebPages.WebPageBase.ExecutePageHierarchy() at System.Web.Mvc.WebViewPage.ExecutePageHierarchy() at System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) at System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilterRecursive(IList1 filters, Int32 filterIndex, ResultExecutingContext preContext, ControllerContext controllerContext, ActionResult actionResult) at System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) at System.Web.Mvc.Async.AsyncControllerActionInvoker.<>c__DisplayClass21.b__1e(IAsyncResult asyncResult)

Answer 1

The exception happens in the ContextEngine constructor, which retrieves the context claims from the Ambient Data Framework. So, probably the ADF is not properly configured.