navigation menu

System.AggregateException: One or more errors occurred. (Value cannot be null. (Parameter 'source'))
 ---> System.ArgumentNullException: Value cannot be null. (Parameter 'source')
   at System.Linq.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
   at System.Linq.Enumerable.TryGetNonEnumeratedCount[TSource](IEnumerable`1 source, Int32& count)
   at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source)
   at AspNetCoreGeneratedDocument.Views_Partials_GridEditors_NavigationMenu.ExecuteAsync() in D:\Repos\Överkalix_Kommun\Overkalix_Kommun_V13\_src\Mirror.Umbraco.Web\Views\Partials\GridEditors\NavigationMenu.cshtml:line 4
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
   at Microsoft.AspNetCore.Mvc.ViewComponents.ViewViewComponentResult.ExecuteAsync(ViewComponentContext context)
   at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentInvoker.InvokeAsync(ViewComponentContext context)
   at Microsoft.AspNetCore.Mvc.ViewComponents.DefaultViewComponentHelper.InvokeCoreAsync(ViewComponentDescriptor descriptor, Object arguments)
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
   at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
   at Our.Umbraco.DocTypeGridEditor.Helpers.DocTypeGridEditorHelper.RenderDocTypeGridEditorItem(IViewComponentHelper helper, IHtmlHelper htmlHelper, Object model) in D:\Repos\Överkalix_Kommun\Overkalix_Kommun_V13\_src\Plugins\Our.Umbraco.DocTypeGridEditor\Helpers\DocTypeGridEditorHelper.cs:line 227
   at AspNetCoreGeneratedDocument.App_Plugins_mDocTypeGridEditor_Render_DocTypeGridEditor.ExecuteAsync()
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageCoreAsync(IRazorPage page, ViewContext context)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderPageAsync(IRazorPage page, ViewContext context, Boolean invokeViewStarts)
   at Microsoft.AspNetCore.Mvc.Razor.RazorView.RenderAsync(ViewContext context)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.RenderPartialCoreAsync(String partialViewName, Object model, ViewDataDictionary viewData, TextWriter writer)
   at Microsoft.AspNetCore.Mvc.ViewFeatures.HtmlHelper.PartialAsync(String partialViewName, Object model, ViewDataDictionary viewData)
   at AspNetCoreGeneratedDocument.Views_Partials_Grid_editors_base.ExecuteAsync() in D:\Repos\Överkalix_Kommun\Overkalix_Kommun_V13\_src\Mirror.Umbraco.Web\Views\Partials\Grid\editors\base.cshtml:line 5