When starting a project I can not see my workflow

Hi all,

i am not able to look at my workflows in the xaml. I get the following error message!

Any Idea what the Isse is? I allready tried reinstalling

19.10.2+Branch.master.Sha.259f90ae98fad42c3542963e70782dbe96e04579

Exception has been thrown by the target of an invocation.

Error: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. —> System.InvalidOperationException: Cannot place windows in MDI since no MDI host (TabbedMdiHost, StandardMdiHost, etc.) was located as the direct child of the DockSite’s Workspace.
at ActiproSoftware.Windows.Controls.Docking.Logic.LayoutChangeProcessor.#58i(DockingWindow #sb, DockHost #d6i, DockingWindowState #Zb, Nullable1 #Fwf) at ActiproSoftware.Windows.Controls.Docking.Logic.LayoutChangeProcessor.#V8i(DockingWindow #sb, IDockTarget #F8i, Nullable1 #Zb, Nullable1 #Fwf, Int32 #G8i) at ActiproSoftware.Windows.Controls.Docking.Logic.LayoutChangeProcessor.Open(DockingWindow #sb) at ActiproSoftware.Windows.Controls.Docking.DockingWindow.Open() at UiPath.Studio.Shell.Behaviors.DockSiteViewModelBehavior.OpenDockingWindow(DockingWindow dockingWindow) at UiPath.Studio.Shell.Behaviors.DockSiteViewModelBehavior.OnDockSiteWindowRegistered(Object sender, DockingWindowEventArgs e) --- End of inner exception stack trace --- at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments) at System.Delegate.DynamicInvokeImpl(Object[] args) at System.Windows.RoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e) at ActiproSoftware.Windows.Controls.Docking.DockSite.RaiseWindowRegisteredEvent(DockingWindow window) at ActiproSoftware.Windows.Controls.Docking.DockSite.EnsureDockingWindowRegistered(DockingWindow window, Boolean wasContainerForItem) at ActiproSoftware.Windows.Controls.Docking.DockingWindow.set_DockSite(DockSite value) at ActiproSoftware.Windows.Controls.Docking.DockSite.AddContainers(IList1 containers, IList items, Int32 index, DockingWindowItemKind kind)
at ActiproSoftware.Windows.Controls.Docking.DockSite.OnDocumentItemsSourceCollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
at System.Collections.ObjectModel.ObservableCollection1.OnCollectionChanged(NotifyCollectionChangedEventArgs e) at System.Collections.ObjectModel.ObservableCollection1.InsertItem(Int32 index, T item)
at System.Collections.ObjectModel.Collection`1.Add(T item)
at UiPath.Studio.Shell.ViewModels.MainWindowViewModel.<>c__DisplayClass114_0.b__0()
at UiPath.Studio.Shared.MVVM.Services.DispatcherExtensions.Invoke(Dispatcher dispatcher, Action action, Boolean onlyBeginInvokeWhenNoAccess)
at UiPath.Studio.Shared.MVVM.Services.DispatcherService.Invoke(Action action, Boolean onlyInvokeWhenNoAccess)
at UiPath.Studio.Shell.ViewModels.MainWindowViewModel.d__114.MoveNext()
— 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 UiPath.Studio.Shell.ViewModels.MainWindowViewModel.d__112.MoveNext()
— End of stack trace from previous location where exception was thrown —
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.b__6_0(Object state)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler), HResult -2146232828

Hello @SchnEck

Check below post

Hope this helps you

Thanks