Something in my installation is a little messed up. My root node and a top level category node won't save and publish.

An error occurred Value cannot be null. Parameter name: name Exception Details System.ArgumentNullException: Value cannot be null. Parameter name: name

Other nodes such as subcategories and products work fine. I think I tried everything in the book, such as deleting temp-folders and also tried rebuild database cache and reload memory cache. Trying these things gives me similar errors. :(

To me it looks like it needs the default name, which sounds weird.

Stacktrace at Umbraco.Core.Models.PublishedContent.PublishedCultureInfo..ctor(String culture, String name, String urlSegment, DateTime date) in D:\a\1\s\src\Umbraco.Core\Models\PublishedContent\PublishedCultureInfos.cs:line 17 at Umbraco.Web.PublishedCache.NuCache.PublishedContent.get_Cultures() in D:\a\1\s\src\Umbraco.Web\PublishedCache\NuCache\PublishedContent.cs:line 195 at Umbraco.Core.Models.PublishedContent.PublishedContentWrapped.get_Cultures() in D:\a\1\s\src\Umbraco.Core\Models\PublishedContent\PublishedContentWrapped.cs:line 103 at Umbraco.Web.Routing.RedirectTrackingComponent.StoreOldRoute(IContent entity, OldRoutesDictionary oldRoutes) in D:\a\1\s\src\Umbraco.Web\Routing\RedirectTrackingComponent.cs:line 114 at Umbraco.Web.Routing.RedirectTrackingComponent.ContentService_Publishing(IContentService sender, PublishEventArgs1 args) in D:\a\1\s\src\Umbraco.Web\Routing\RedirectTrackingComponent.cs:line 67 at Umbraco.Core.Events.QueuingEventDispatcherBase.DispatchCancelable[TSender,TArgs](TypedEventHandler2 eventHandler, TSender sender, TArgs args, String eventName) in D:\a\1\s\src\Umbraco.Core\Events\QueuingEventDispatcherBase.cs:line 54 at Umbraco.Core.Services.Implement.ContentService.StrategyCanPublish(IScope scope, IContent content, Boolean checkPath, IReadOnlyList1 culturesPublishing, IReadOnlyCollection1 culturesUnpublishing, EventMessages evtMsgs, ContentSavingEventArgs savingEventArgs, IReadOnlyCollection1 allLangs) in D:\a\1\s\src\Umbraco.Core\Services\Implement\ContentService.cs:line 2673 at Umbraco.Core.Services.Implement.ContentService.CommitDocumentChangesInternal(IScope scope, IContent content, ContentSavingEventArgs saveEventArgs, IReadOnlyCollection1 allLangs, Int32 userId, Boolean raiseEvents, Boolean branchOne, Boolean branchRoot) in D:\a\1\s\src\Umbraco.Core\Services\Implement\ContentService.cs:line 1174 at Umbraco.Core.Services.Implement.ContentService.SaveAndPublish(IContent content, String culture, Int32 userId, Boolean raiseEvents) in D:\a\1\s\src\Umbraco.Core\Services\Implement\ContentService.cs:line 930 at Umbraco.Web.Editors.ContentController.PublishInternal(ContentItemSave contentItem, String defaultCulture, String cultureForInvariantErrors, Boolean& wasCancelled, String[]& successfulCultures) in D:\a\1\s\src\Umbraco.Web\Editors\ContentController.cs:line 1365 at Umbraco.Web.Editors.ContentController.PostSaveInternal(ContentItemSave contentItem, Func2 saveMethod, Func2 mapToDisplay) in D:\a\1\s\src\Umbraco.Web\Editors\ContentController.cs:line 867 at Umbraco.Web.Editors.ContentController.PostSave(ContentItemSave contentItem) in D:\a\1\s\src\Umbraco.Web\Editors\ContentController.cs:line 731 at lambda_method(Closure , Object , Object[] ) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.<>cDisplayClass6_2.2(Object instance, Object[] methodParameters) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ActionExecutor.Execute(Object instance, Object[] arguments) at System.Web.Http.Controllers.ReflectedHttpActionDescriptor.ExecuteAsync(HttpControllerContext controllerContext, IDictionary`2 arguments, CancellationToken cancellationToken) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.Controllers.ApiControllerActionInvoker.