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on clicking the navigation, getting the following error Kindly suggest me a solution System.NullReferenceException: Object reference not set to an instance of an object.    at Mendix.Modeler.WebUI.Forms.Actions.CreateObjectClientAction.GetAllowedRoles() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI\Forms\Actions\CreateObjectClientAction.cs:line 98    at Mendix.Modeler.WebUI.View.MenuEditor.MenuItemNode..ctor(MenuItem element, IIconVisualizer iconVisualizer, IIconManager iconManager) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\MenuEditor\MenuItemNode.cs:line 19    at Mendix.Modeler.WebUI.View.MenuEditor.MenuTreeViewModel.CreateNode(MenuItem item) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\MenuEditor\MenuTreeViewModel.cs:line 100    at System.Linq.Enumerable.SelectIListIterator`2.MoveNext()    at System.Linq.Enumerable.CastIterator[TResult](IEnumerable source)+MoveNext()    at System.Linq.Enumerable.CastIterator[TResult](IEnumerable source)+MoveNext()    at Mendix.Modeler.Controls.Tree.Node.AddRange(IEnumerable`1 nodes) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls\Tree\Nodes\Node.cs:line 177    at Mendix.Modeler.Controls.Tree.Node`1.AddRange(IEnumerable`1 nodes) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls\Tree\Nodes\NodeOfT.cs:line 23    at Mendix.Modeler.WebUI.View.MenuEditor.MenuTreeViewModel.CreateNode(MenuItem item) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\MenuEditor\MenuTreeViewModel.cs:line 101    at System.Linq.Enumerable.SelectIListIterator`2.ToArray()    at Mendix.Modeler.WebUI.View.MenuEditor.MenuTreeViewModel.Rebuild() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\MenuEditor\MenuTreeViewModel.cs:line 83    at Mendix.Modeler.WebUI.View.MenuEditor.MenuTreeViewModel..ctor(MenuItemCollection menuItemCollection, Selection editorSelection, IIconVisualizer iconVisualizer, IIconManager iconManager, IDragDropHelper dragDropHelper, ICopier copier, INameEditor nameEditor) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\MenuEditor\MenuTreeViewModel.cs:line 53    at Mendix.Modeler.WebUI.View.MenuEditor.MenuTreeControl..ctor(MenuItemCollection menuItems, Selection editorSelection, IIconVisualizer iconVisualizer, IIconManager iconManager, IDragDropHelper dragDropHelper, ICopier copier, INameEditor nameEditor) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\MenuEditor\MenuTreeControl.cs:line 19    at Mendix.Modeler.WebUI.View.Navigation.Web.NavigationProfileFormPart.CreateEtoNavigationControl() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\Navigation\Web\NavigationProfileFormPart.cs:line 130    at Mendix.Modeler.UIFramework.CustomControlSpec`1.CreateInnerControl(IUIFrameworkControlInner uiFrameworkControl) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\CustomControlSpec.cs:line 72    at Mendix.Modeler.UIFramework.InPanelSpec`1.CreateControl(IUIFrameworkControlInner propertiesControl) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\InPanelSpec.cs:line 29    at Mendix.Modeler.UIFramework.GroupBase.FillControls(IUIFrameworkControlInner propertiesControl, GroupBase oldGroupSpec, Container container) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\GroupBase.cs:line 44    at Mendix.Modeler.UIFramework.GroupBoxSpec.UpdateControl(IUIFrameworkControlInner propertiesControl, Control control, FormElement oldElement) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\GroupBoxSpec.cs:line 48    at Mendix.Modeler.UIFramework.GroupBase.FillControls(IUIFrameworkControlInner propertiesControl, GroupBase oldGroupSpec, Container container) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\GroupBase.cs:line 51    at Mendix.Modeler.UIFramework.TableSpec.UpdateControl(IUIFrameworkControlInner propertiesControl, Control control, FormElement oldElement) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\TableSpecs\TableSpec.cs:line 72    at Mendix.Modeler.UIFramework.GroupBase.FillControls(IUIFrameworkControlInner propertiesControl, GroupBase oldGroupSpec, Container container) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\GroupBase.cs:line 51    at Mendix.Modeler.UIFramework.TabControlSpec.UpdateControl(IUIFrameworkControlInner _propertiesControl, Control control, FormElement oldElement) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\TabControlSpecs\TabControlSpec.cs:line 144    at Mendix.Modeler.UIFramework.GroupBase.FillControls(IUIFrameworkControlInner propertiesControl, GroupBase oldGroupSpec, Container container) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Specs\GroupBase.cs:line 51    at Mendix.Modeler.UIFramework.UIFrameworkEtoControlBase.RebuildContents() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Controls\UIFrameworkEtoControlBase.cs:line 112    at Mendix.Modeler.UIFramework.UIFrameworkEtoControlBase.Init(IUIFrameworkControlSpec _controlSpec, IFormButtonsManager _formButtonsManager) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Controls\UIFrameworkEtoControlBase.cs:line 41    at Mendix.Modeler.UIFramework.UIFrameworkControlFactory.Create(IUIFrameworkControlSpec controlSpec) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.UIFramework\Controls\UIFrameworkControlFactory.cs:line 18    at Mendix.Modeler.Core.View.TabbedEditors.UIFrameworkTabbedEditor.Init(IUIFrameworkControlSpec controlSpec) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\TabbedEditors\UIFrameworkTabbedEditor.cs:line 40    at Mendix.Modeler.WebUI.View.Navigation.NavigationEditor..ctor(NavigationDocument document, IEnumerable`1 formPartFactories, IProjectManager projectManager, IStorageUI storageUI, IToolWindowManager toolWindowManager, IClipboard clipboard, IModelerSettingsManager modelerSettingsManager, IUIFrameworkControlFactory uiFrameworkControlFactory, IConflictStatusBarFactory conflictStatusBarFactory, IDialogs dialogs) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\Navigation\NavigationEditor.cs:line 42    at Mendix.Modeler.WebUI.View.Navigation.NavigationViewProvider.CreateTabbedEditor(NavigationDocument document) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.WebUI.View\Navigation\NavigationViewProvider.cs:line 52    at Mendix.Modeler.Core.View.Editors.TabbedDocumentViewProviderBase`1.Mendix.Modeler.Core.View.Common.Editors.IDocumentViewProvider.CreateTabbedEditor(IDocumentBase document) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\Editors\TabbedDocumentViewProviderBase.cs:line 14    at Mendix.Modeler.Core.View.MainWindow.DockControlViewModel.<>c__DisplayClass51_0.<AddTabbedEditor>b__1() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\MainWindow\DockControlViewModel.cs:line 189    at Mendix.Modeler.Core.Gui.GuiThreadExecutor.<>c__DisplayClass4_0`1.<WrapActionWithRethrowHack>b__0() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Core\Gui\GuiThreadExecutor.cs:line 47 --- End of stack trace from previous location ---    at Mendix.Modeler.Core.Gui.GuiThreadExecutor.Rethrow(Exception ex) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Core\Gui\GuiThreadExecutor.cs:line 59    at Mendix.Modeler.Core.Gui.GuiThreadExecutor.<>c__DisplayClass4_0`1.<WrapActionWithRethrowHack>b__0() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Core\Gui\GuiThreadExecutor.cs:line 51    at Eto.Forms.Application.<>c__DisplayClass57_0`1.<Invoke>b__0()    at Eto.Forms.Application.Invoke[T](Func`1 func)    at Mendix.Modeler.Core.Gui.GuiThreadExecutor.Execute[T](Func`1 func) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Core\Gui\GuiThreadExecutor.cs:line 18    at Mendix.Modeler.Core.View.MainWindow.DockControlViewModel.AddTabbedEditor(IDocumentBase document) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\MainWindow\DockControlViewModel.cs:line 188    at Mendix.Modeler.MainWindow.Managers.TabbedEditorManager.EditDocument(IDocumentBase document) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.MainWindow\Managers\TabbedEditorManager.cs:line 67    at Mendix.Modeler.Core.View.Common.Editors.DocumentViewManager.EditInTabbedEditor(IDocument document, FocusInfo focusInfo) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\Common\Editors\DocumentViewManager.cs:line 89    at Mendix.Modeler.Core.View.Common.Editors.DocumentViewManager.EditDocument(IDocument document, FocusInfo focusInfo, Boolean isNew) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\Common\Editors\DocumentViewManager.cs:line 67    at Mendix.Modeler.Common.DocumentUtil.Edit(IDocument document, FocusInfo focusInfo, Boolean isNew) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Common\Model\DocumentUtil.cs:line 9    at Mendix.Modeler.Projects.ProjectExplorers.DocumentNode.ActivateNode() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core\Projects\ProjectExplorers\DocumentNode.cs:line 29    at Mendix.Modeler.Core.View.ToolWindows.ProjectExplorer.<>c.<OnActivated>b__24_0(IProjectExplorerNode node) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\ToolWindows\ProjectExplorer\ProjectExplorer.cs:line 111    at System.Collections.Generic.List`1.ForEach(Action`1 action)    at Mendix.Modeler.Core.View.ToolWindows.ProjectExplorer.OnActivated(IEnumerable`1 nodes) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Core.View.CrossPlatform\ToolWindows\ProjectExplorer\ProjectExplorer.cs:line 111    at Mendix.Modeler.Controls.Tree.TreeViewModel`2.RaiseActivated() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls\Tree\ViewModels\TreeViewModel.cs:line 256    at Mendix.Modeler.Controls.Tree.TreeControl`2.OnActivated(Object sender, TreeGridViewItemEventArgs e) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls\Tree\Views\TreeControl.cs:line 175    at Eto.PropertyStore.TriggerEvent[T](Object key, Object sender, T args)    at Eto.Forms.TreeGridView.OnActivated(TreeGridViewItemEventArgs e)    at Mendix.Modeler.Controls.Tree.TreeControl`2.RaiseActivated() in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls\Tree\Views\TreeControl.cs:line 138    at Mendix.Modeler.Controls.Tree.TreeControlMouseHandler`2.OnTreeItemMouseDoubleClick(MouseEventArgs e) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls\Tree\Views\TreeControlMouseHandler.cs:line 30    at Mendix.Modeler.Controls.Tree.IconsAndLabelTreeColumn.<>c__DisplayClass17_0.<Init>b__4(Object s, MouseEventArgs e) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls\Tree\Views\Columns\IconsAndLabelTreeColumn.cs:line 33    at Mendix.Modeler.Controls.Windows.Tree.IconsAndLabelTreeColumnHandler.Column.<>c__DisplayClass11_0.<BindEventHandlers>b__2(Object s, MouseButtonEventArgs e) in C:\Users\Autobuild\workspace\AppStudio4.0-Build\modeler\Mendix.Modeler.Controls.Windows\Tree\IconsAndLabelTreeColumnHandler.cs:line 222    at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)    at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)    at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)    at System.Windows.ContentElement.RaiseTrustedEvent(RoutedEventArgs args)    at System.Windows.Input.InputManager.ProcessStagingArea()    at System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)    at System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)    at System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)    at System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)    at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)    at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)    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)

asked 2023-04-14

1 answers