System.NullReferenceException: Object reference not set to an instance of an object. at ASP._Page_Views_Partials_DocTypeGridEditor_ZINMAG2019_zinmag2019PublicatieLijstGridEditor_cshtml.Execute() in D:\wwwroot\_releases\Landstede.Websites.v8temp\0.0.46\Views\Partials\DocTypeGridEditor\ZINMAG2019\zinmag2019PublicatieLijstGridEditor.cshtml:line 23 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.Web.Mvc.ProfilingView.Render(ViewContext viewContext, TextWriter writer) at System.Web.Mvc.Html.PartialExtensions.Partial(HtmlHelper htmlHelper, String partialViewName, Object model, ViewDataDictionary viewData) at Our.Umbraco.DocTypeGridEditor.Web.Extensions.HtmlHelperExtensions.RenderDocTypeGridEditorItem(HtmlHelper helper, IPublishedElement content, String editorAlias, String viewPath, String previewViewPath, Boolean isPreview) at ASP._Page_app_plugins_doctypegrideditor_render_DocTypeGridEditor_cshtml.Execute() in D:\wwwroot\_releases\Landstede.Websites.v8temp\0.0.46\app_plugins\doctypegrideditor\render\DocTypeGridEditor.cshtml:line 28 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.Web.Mvc.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 D:\wwwroot\_releases\Landstede.Websites.v8temp\0.0.46\Views\Partials\grid\editors\Base.cshtml:line 20