Hi, I'm trying to add comments to some segments in my current project. However, whenever I try, I get an "Object reference not set to an instance of an object" error.

I can't say I understand the stack trace, so I was hoping somebody could help me decipher this to find a solution.

<SDLErrorDetails time="2023-11-02 14:21:40">
  <ErrorMessage>Object reference not set to an instance of an object.</ErrorMessage>
  <Exception>
    <Type>System.NullReferenceException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
    <HelpLink />
    <Source>Sdl.TranslationStudioAutomation.IntegrationApi</Source>
    <HResult>-2147467261</HResult>
    <StackTrace><![CDATA[   at Sdl.TranslationStudioAutomation.IntegrationApi.Document.InternalDocument_CommentAdded(Object sender, CommentNodeEventArgs e)
   at Sdl.TranslationStudio.Editor.TranslationEditor.TranslatableDocument.<LoadCommentSupport>b__79_0(Object sender, CommentNodeEventArgs e)
   at Sdl.TranslationStudio.Editor.TranslationEditor.CommentSupport.AddRangeComment(ContentRange range, ICommentProperties comments)
   at Sdl.TranslationStudio.Editor.TranslationEditor.CommentSupport.AddSegmentComment(ISegmentContainerNode segmentContainerNode, ICommentProperties comment)
   at Sdl.TranslationStudio.Editor.TranslationEditor.TranslatableDocument.AddSegmentComment(ISegmentContainerNode segmentContainerNode, ICommentProperties comment)
   at Sdl.TranslationStudio.Editor.Comments.AddCommentDlg.AddComment()
   at Sdl.TranslationStudio.Editor.Comments.Actions.AddCommentAction.Execute()
   at Sdl.Desktop.Platform.Implementation.CommandBars.SimpleActionExecuter.Execute(ActionData actionData)
   at Sdl.Desktop.Platform.Implementation.ResourceLoggingInternalCommandExecuter`1.ExecuteWithResourceLogging(TCommandData commandData, String message)
   at Sdl.Desktop.Platform.Implementation.CommandBars.ActionService.ExecuteAction(IAction action, ActionOrigin origin, Boolean allowToggle)
   at Sdl.Desktop.Platform.WinForms.IgCommandBarAction.Execute()
   at Sdl.Desktop.Platform.WinForms.IgCommandBarAction._lazyButtonTool_ToolClick(Object sender, ToolClickEventArgs e)
   at Infragistics.Win.UltraWinToolbars.ToolBase.OnToolClick(ToolClickEventArgs e)
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.OnToolClick(ToolClickEventArgs e)
   at Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.FireEvent(ToolbarEventIds id, EventArgs e)
   at Infragistics.Win.UltraWinToolbars.ToolBase.OnToolClick()
   at Infragistics.Win.UltraWinToolbars.ToolMenuItem.OnClick()
   at Infragistics.Win.UltraWinToolbars.PopupMenuItemUIElement.DoClickProcessing(MouseEventArgs e)
   at Infragistics.Win.UltraWinToolbars.PopupMenuItemUIElement.OnMouseUp(MouseEventArgs e)
   at Infragistics.Win.TextUIElementBase.OnMouseUp(MouseEventArgs e)
   at Infragistics.Win.ControlUIElementBase.ProcessMouseUpHelper(Object sender, MouseEventArgs e)
   at Infragistics.Win.ControlUIElementBase.ProcessMouseUp(Object sender, MouseEventArgs e)
   at Infragistics.Win.Utilities.ProcessEvent(Control control, ProcessEvent eventToProcess, EventArgs e)
   at Infragistics.Win.UltraWinToolbars.PopupControlBase.OnMouseUp(MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)]]></StackTrace>
  </Exception>
  <Environment>
    <ProductName>Trados Studio</ProductName>
    <ProductVersion>Studio16</ProductVersion>
    <EntryAssemblyFileVersion>16.2.10.9305</EntryAssemblyFileVersion>
    <OperatingSystem>Microsoft Windows 11 Home</OperatingSystem>
    <ServicePack>NULL</ServicePack>
    <OperatingSystemLanguage>1033</OperatingSystemLanguage>
    <CodePage>1252</CodePage>
    <LoggedOnUser>_</LoggedOnUser>
    <DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
    <ComputerName>_</ComputerName>
    <ConnectedToNetwork>True</ConnectedToNetwork>
    <PhysicalMemory>6286016 MB</PhysicalMemory>
  </Environment>
</SDLErrorDetails>