La fenêtre de modifications en attente d'AnkhSVN lève une exception dans Visual Studio 2019

J'utilise AnkhSVN comme plug-in de contrôle de source. Lors de l'ouverture de la fenêtre Modifications en attente dans Visual Studio 2019, une exception se produit. 

An internal error occured:
Object reference not set to an instance of an object.

System.NullReferenceException: Object reference not set to an instance of an object.
   at Ankh.VS.Selection.CommandState.LoadThemeData()
   at Ankh.VS.Selection.CommandState.get_ThemeDefined()
   at Ankh.UI.PendingChanges.Commits.PendingCommitItem.RefreshText(IAnkhServiceProvider context)
   at Ankh.UI.PendingChanges.Commits.PendingCommitItem..ctor(PendingCommitsView view, PendingChange change)
   at Ankh.UI.PendingChanges.Commits.PendingCommitItemCollection.GetWrapItem(PendingChange inner)
   at Ankh.Collections.KeyedWrapNotifyCollection`3.WrapInnerKeyedCollection.ResetCollection()
   at Ankh.Collections.KeyedWrapNotifyCollection`3..ctor(IKeyedNotifyCollection`2 collection, Object context)
   at Ankh.UI.PendingChanges.Commits.PendingCommitsView.Ankh.UI.IPendingChangeUI.set_Items(IKeyedNotifyCollection`2 value)
   at Ankh.UI.PendingChanges.PendingCommitsPage.HookList()
   at Ankh.UI.PendingChanges.PendingCommitsPage.OnLoad(EventArgs e)
   at System.Windows.Forms.UserControl.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
   at System.Windows.Forms.Control.set_Visible(Boolean value)
   at Ankh.UI.PendingChanges.PendingChangesToolControl.ShowPanel(PendingChangesPage page, Boolean select)
   at Ankh.UI.PendingChanges.PendingChangesToolControl.OnLoad(EventArgs e)
   at System.Windows.Forms.UserControl.OnCreateControl()
   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
   at System.Windows.Forms.Control.CreateControl()
   at Ankh.VSPackage.AnkhToolWindowPane.get_Window()
   at Microsoft.VisualStudio.Shell.WindowPane.Microsoft.VisualStudio.Shell.Interop.IVsUIElementPane.CreateUIElementPane(Object& uiElement)
   at Microsoft.VisualStudio.Platform.WindowManagement.UIElementDocumentObject.Init(Boolean initSize)
   at Microsoft.VisualStudio.Platform.WindowManagement.DocumentObjectSite.InitializeDocumentObject(Object punkView)
   at Microsoft.VisualStudio.Platform.WindowManagement.WindowManagerService.CreateContentPane(FrameMoniker frameMoniker, Boolean isDocument, String lpstrMkDoc, UInt32 eCreateWindowFlags, Object punkView, Object punkData, IServiceProvider pServiceProvider, IVsUIHierarchy pUIHierarchy, UInt32 vsid, Guid rguidCmdUI, ViewGroup parent, IVsWindowFrame& ppWindowFrame)
   at Microsoft.VisualStudio.Platform.WindowManagement.WindowManagerService.CreateContentPane(String pszName, Int32 fDockViewOn, Int32 fDocument, String lpstrMkDoc, UInt32 eCreateWindowFlags, UInt32 dwToolWinId, Object punkView, Object punkData, IServiceProvider pServiceProvider, IVsUIHierarchy pUIHierarchy, UInt32 vsid, Int32& pfDefaultPosition, Guid& rguidCmdUI, IVsWindowFrame& ppWindowFrame)
   at System.Runtime.InteropServices.Marshal.ThrowExceptionForHRInternal(Int32 errorCode, IntPtr errorInfo)
   at Microsoft.VisualStudio.Shell.Package.CreateFrameForToolWindow(ToolWindowCreationResult result, Int32 id, Guid persistenceGuid)
   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, UInt32 flags, Object context, Guid persistenceGuid)
   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id, Object context)
   at Microsoft.VisualStudio.Shell.Package.CreateToolWindow(Type toolWindowType, Int32 id)
   at Microsoft.VisualStudio.Shell.Package.FindToolWindow(Type toolWindowType, Int32 id, Boolean create, ProvideToolWindowAttribute tool)
   at Ankh.VSPackage.AnkhSvnPackage.ShowToolWindow(AnkhToolWindow toolWindow, Int32 id, Boolean create)
   at Ankh.VSPackage.AnkhSvnPackage.ShowToolWindow(AnkhToolWindow window)
   at Ankh.Commands.UI.ShowToolWindows.OnExecute(CommandEventArgs e)
   at Ankh.Commands.CommandMapItem.OnExecute(CommandEventArgs e)
   at Ankh.Commands.CommandMapper.Execute(AnkhCommand command, CommandEventArgs e)

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