A term which I could only describe as "corrupted" is causing trouble in my Termbase. Namely, it cannot be removed, as selecting it triggers the "Object reference not set" error box. If I close that box and delete the entry from Trados, nothing won't be erased, and certainly NOT the troublesome term. And reorganizing termbase in Multiterm does NOTHING. And changing the termbase viewer layout does nothing either, the problematiccterm is unkillable and undeleteable.

Any ideas?

This is the errorlog.

<SDLErrorDetails time="04/01/2020 5:48:47">
  <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.TranslationStudio.Editor</Source>
    <HResult>-2147467261</HResult>
    <StackTrace><![CDATA[   at Sdl.TranslationStudio.Editor.Terminology.TermbaseViewer.TermHit.FromTermAccessTermHit(ITermHit term, ITerminologyProvider termbase)
   at Sdl.TranslationStudio.Editor.Terminology.TermbaseViewer.MultiTermViewerWinFormsUI.MiniEditor_TermSelected(ITermHit term)
   at Sdl.MultiTerm.Client.MiniEditor.MiniEditor.control_TermSelected(ITermHit term)
   at Sdl.MultiTerm.Client.MiniEditor.MiniEditorControl.TermBrowser_TermSelected(ITermHit term)
   at Sdl.MultiTerm.Client.UI.Browser.TermBrowser.FireTermSelectedEvent(ITermHit term)
   at Sdl.MultiTerm.Client.MiniEditor.MiniEditorTermBrowser.OpenWindowRequest(ITermHit hit, Boolean newWindow)
   at Sdl.MultiTerm.Client.UI.Browser.BrowseListControl.lstItems_SelectedIndexChanged(Object sender, EventArgs e)
   at System.Windows.Forms.ListBox.OnSelectedIndexChanged(EventArgs e)
   at System.Windows.Forms.ListBox.WmReflectCommand(Message& m)
   at System.Windows.Forms.ListBox.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>SDL Trados Studio</ProductName>
    <ProductVersion>15.0.0.0</ProductVersion>
    <EntryAssemblyFileVersion>15.2.5.2145</EntryAssemblyFileVersion>
    <OperatingSystem>Microsoft Windows 10 Pro</OperatingSystem>
    <ServicePack>NULL</ServicePack>
    <OperatingSystemLanguage>3082</OperatingSystemLanguage>
    <CodePage>1252</CodePage>
    <LoggedOnUser>PORTÁTIL\inive</LoggedOnUser>
    <DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
    <ComputerName>PORTÁTIL</ComputerName>
    <ConnectedToNetwork>True</ConnectedToNetwork>
    <PhysicalMemory>24960528 MB</PhysicalMemory>
  </Environment>
</SDLErrorDetails>