System.InvalidCastException: Specified cast is not valid.
   at Setter(Object , Object )
   at Our.Umbraco.Ditto.FastPropertyAccessor.SetValue(PropertyInfo property, Object instance, Object value)
   at Our.Umbraco.Ditto.PublishedContentExtensions.ConvertContent(IPublishedContent content, Type type, IDittoContextAccessor contextAccessor, CultureInfo culture, Object instance, Action`1 onConverting, Action`1 onConverted, DittoChainContext chainContext)
   at Our.Umbraco.Ditto.PublishedContentExtensions.As(IPublishedContent content, Type type, CultureInfo culture, Object instance, IEnumerable`1 processorContexts, Action`1 onConverting, Action`1 onConverted, DittoChainContext chainContext)
   at Our.Umbraco.Ditto.RecursiveDittoAttribute.ProcessValue()
   at Our.Umbraco.Ditto.DittoCacheableAttribute.GetCacheItem[TOuputType](DittoCacheContext cacheContext, Func`1 refresher)
   at Our.Umbraco.Ditto.PublishedContentExtensions.DoGetProcessedValue(IPublishedContent content, PropertyInfo propertyInfo, IDittoContextAccessor contextAccessor, DittoProcessorContext baseProcessorContext, DittoChainContext chainContext)
   at Our.Umbraco.Ditto.PublishedContentExtensions.GetProcessedValue(IPublishedContent content, CultureInfo culture, Type targetType, PropertyInfo propertyInfo, Object instance, IDittoContextAccessor contextAccessor, DittoChainContext chainContext)
   at Our.Umbraco.Ditto.PublishedContentExtensions.ConvertContent(IPublishedContent content, Type type, IDittoContextAccessor contextAccessor, CultureInfo culture, Object instance, Action`1 onConverting, Action`1 onConverted, DittoChainContext chainContext)
   at Our.Umbraco.Ditto.PublishedContentExtensions.As(IPublishedContent content, Type type, CultureInfo culture, Object instance, IEnumerable`1 processorContexts, Action`1 onConverting, Action`1 onConverted, DittoChainContext chainContext)
   at Our.Umbraco.Ditto.PublishedContentExtensions.As[T](IPublishedContent content, CultureInfo culture, T instance, IEnumerable`1 processorContexts, Action`1 onConverting, Action`1 onConverted, DittoChainContext chainContext)
   at Our.Umbraco.Ditto.DittoViewModel`1.get_View()
   at ASP._Page_Views_Custom_Modules_heroModule_cshtml.Execute() in c:\home\site\wwwroot\Views\Custom\Modules\HeroModule.cshtml:line 2
   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 Our.Umbraco.DocTypeGridEditor.Web.Extensions.HtmlHelperExtensions.RenderDocTypeGridEditorItem(HtmlHelper helper, IPublishedContent content, String editorAlias, String viewPath, String previewViewPath)
   at Pegasus.Web.Extensions.HtmlHelperExtensions.RenderDocTypeGridEditorItem(HtmlHelper helper, JObject model, Int32 pageId)
   at ASP._Page_Views_Custom_Partials_Grid_Editors_DocTypeGridEditor_cshtml.Execute() in c:\home\site\wwwroot\Views\Custom\Partials\Grid\Editors\DocTypeGridEditor.cshtml:line 17
   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_Custom_Partials_Grid_Editors_Base_cshtml.Execute() in c:\home\site\wwwroot\Views\Custom\Partials\Grid\Editors\Base.cshtml:line 25