Quiz: How many epic train journeys have you taken?

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System.NullReferenceException: Object reference not set to an instance of an object.
   at Umbraco.Web.PublishedContentExtensions.HasProperty(IPublishedContent content, String alias)
   at ASP._Page_views_partials_grid_editors_contentcollection_cshtml.Execute() in c:\inetpub\wwwroot\Views\Partials\Grid\Editors\ContentCollection.cshtml:line 46
   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 Umbraco.Core.Profiling.ProfilingView.Render(ViewContext viewContext, TextWriter writer)
   at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData)
   at ASP._Page_Views_Partials_grid_editors_base_cshtml.Execute() in c:\inetpub\wwwroot\Views\Partials\Grid\Editors\Base.cshtml:line 18