Object reference not set to an instance of an object

This is an error that is happening now with me on a basic SRT (txt) file.

I have restarted my computer.   Other suggestions see is to do a Reset.   Hate doing Reset.  Have to go back and redo all of your settings.

This is a brand new install (have reinstalled software a couple of time already).  Using Trados Studio 2022 SR1 - 17.1.8.17828.

What causing this error.

Have attached the error log.

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<SDLErrorDetails time="9/27/2023 3:17:34 PM">
<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>StudioSubtitling</Source>
<HResult>-2147467261</HResult>
<StackTrace><![CDATA[ at StudioSubtitling.ViewModel.SubtitlingViewModel.GetMediaReference(DocumentInfo documentInfo)
at StudioSubtitling.ViewModel.SubtitlingViewModel.SetActiveFile(ProjectFile projectFile)
at StudioSubtitling.ViewModel.SubtitlingViewModel.SetActiveDocument(IStudioDocument document)
at StudioSubtitling.ViewModel.SubtitlingViewModel.EditorController_ActiveDocumentChanged(Object sender, DocumentEventArgs e)
at System.EventHandler`1.Invoke(Object sender, TEventArgs e)
at Sdl.Desktop.Platform.Extensions.EventsExtensions.Raise[T](EventHandler`1 e, Object sender, T eventArgs)
at Sdl.TranslationStudioAutomation.IntegrationApi.EditorController.OnActiveDocumentChanged(IDocument document)
at Sdl.TranslationStudio.Api.Editor.DocumentEventHandler.Invoke(IDocument document)
at Sdl.TranslationStudio.Editor.EditorService.set_ActiveDocument(IDocument value)
at Sdl.TranslationStudio.Editor.EditorView.OnActiveViewPartChanged(IViewPartReference viewPartReference)
at Sdl.Desktop.Platform.AbstractViewWithParts.Control_ActiveViewPartChanged(IViewWithParts view, IViewPartReference viewPartReference)
at Sdl.Platform.UI.DockingViewContentControl.OnActiveViewPartChanged(IViewPartReference viewPartReference)
at Sdl.Platform.UI.DockingViewContentControl.InternalActivateViewPart(IViewPartReference viewPartToActivate)
at Sdl.Platform.UI.DockingViewContentControl._tabControl_SelectedTabChanged(Object sender, SelectedTabChangedEventArgs e)
at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.OnSelectedTabChanged(SelectedTabChangedEventArgs e)
at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.RaiseEvent(UltraTabControlEventId id, EventArgs e)
at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.OnManagerSelectedTabItemChanged(Object sender, SelectedTabItemChangedEventArgs e)
at Infragistics.Win.UltraWinTabs.TabManager.set_SelectedTabItem(ITabItem value)
at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.SetSelectedTab(UltraTab tab)
at Infragistics.Win.UltraWinTabControl.UltraTabControlBase.set_SelectedTab(UltraTab value)
at Sdl.Platform.UI.DockingViewContentControl.AddViewPartTab(IViewPartReference viewPartReference)
at Sdl.Platform.UI.DockingViewContentControl.AddViewPart(IViewPartReference viewPartReference)
at Sdl.Platform.UI.DockingViewContentControl.NotifyViewPartAdded(IViewPartReference viewPartReference)
at Sdl.Desktop.Platform.AbstractViewWithParts.AddViewPart(IViewPartReference viewPartReference)
at Sdl.Desktop.Platform.AbstractDockingView.AddViewPart(IViewPartReference viewPartReference)
at Sdl.TranslationStudio.Editor.EditorView.AddDocumentViewPart(IViewPartReference documentViewPartReference)
at Sdl.TranslationStudio.Editor.Shared.InternalEditorContext.AddDocumentViewPart(IDocumentViewPart documentViewPart)
at Sdl.TranslationStudio.Api.Editor.AbstractInternalDocument.AfterLoad(IJob job)]]></StackTrace>
</Exception>
<Environment>
<ProductName>Trados Studio</ProductName>
<ProductVersion>Studio17</ProductVersion>
<EntryAssemblyFileVersion>17.1.8.17828</EntryAssemblyFileVersion>
<OperatingSystem>Microsoft Windows 10 Enterprise LTSC</OperatingSystem>
<ServicePack>NULL</ServicePack>
<OperatingSystemLanguage>1033</OperatingSystemLanguage>
<CodePage>1252</CodePage>
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