I've been having this problem for about a month since I used Studio 2019's auto-update feature.
I am unable to create new termbases. The precise message given is "MultiTerm is unable to create the termbase. エラーを特定できません". The latter Japanese (which is the language I translate from) says "unidentified error".
I tried manually updating MultiTerm and it didn't fix the problem.
Here's the error output:
<?xml version="1.0"?>
-<SDLErrorDetails time="2020/04/03 1:38:13">
<ErrorMessage>MultiTerm is unable to create the termbase. エラーを特定できません</ErrorMessage>
-<Exception>
<Type>System.Runtime.InteropServices.COMException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
<ErrorCode>-2147220924</ErrorCode>
<HelpLink/>
<Source>MtServer</Source>
<HResult>-2147220924</HResult>
-<StackTrace>
<![CDATA[ at Sdl.MultiTerm.TMO.Interop.TermbasesClass.New(String TermbaseName, String Description, String TermbaseDefinitionFile, String TermbaseDestinationFilePath) at Sdl.TranslationStudio.ProjectManagement.Terminology.FileBasedTermbase.TermbaseCreator.CreateTermbase(TermbaseDefinitionWizard xdtWizard) at Sdl.TranslationStudio.ProjectManagement.Terminology.FileBasedTermbase.TermbaseCreator.CreateTermbase() at Sdl.TranslationStudio.ProjectManagement.Terminology.ProjectTermbasesControl.newFilebasedTermbaseToolStripMenuItem_Click(Object sender, EventArgs e) at System.Windows.Forms.ToolStripItem.RaiseEvent(Object key, EventArgs e) at System.Windows.Forms.ToolStripMenuItem.OnClick(EventArgs e) at System.Windows.Forms.ToolStripItem.HandleClick(EventArgs e) at System.Windows.Forms.ToolStripItem.HandleMouseUp(MouseEventArgs e) at System.Windows.Forms.ToolStripItem.FireEventInteractive(EventArgs e, ToolStripItemEventType met) at System.Windows.Forms.ToolStripItem.FireEvent(EventArgs e, ToolStripItemEventType met) at System.Windows.Forms.ToolStrip.OnMouseUp(MouseEventArgs mea) at System.Windows.Forms.ToolStripDropDown.OnMouseUp(MouseEventArgs mea) at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.ToolStrip.WndProc(Message& m) at System.Windows.Forms.ToolStripDropDown.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 8.1</OperatingSystem>
<ServicePack>NULL</ServicePack>
<OperatingSystemLanguage>1041</OperatingSystemLanguage>
<CodePage>932</CodePage>
<LoggedOnUser>Dell-PC\DELL</LoggedOnUser>
<DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
<ComputerName>DELL-PC</ComputerName>
<ConnectedToNetwork>True</ConnectedToNetwork>
<PhysicalMemory>16659916 MB</PhysicalMemory>
</Environment>
</SDLErrorDetails>