"There is an item with the same key" Error message when adding the Google translate API

Hello,

When I try to add the Google translate API to my Trados Studio 2021 with the MT Enhanced Trados Plugin, it gives me te following error:

<SDLErrorDetails time="6-12-2020 12:06:07">
  <ErrorMessage>Er is al een item met dezelfde sleutel toegevoegd.</ErrorMessage>
  <Exception>
    <Type>System.ArgumentException, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</Type>
    <ParamName />
    <HelpLink />
    <Source>mscorlib</Source>
    <HResult>-2147024809</HResult>
    <StackTrace><![CDATA[   bij System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   bij System.Collections.Generic.Dictionary`2.Insert(TKey key, TValue value, Boolean add)
   bij System.Collections.Generic.Dictionary`2.Add(TKey key, TValue value)
   bij Sdl.Community.MtEnhancedProvider.ViewModel.MainWindowViewModel.SetGeneralProviderOptions()
   bij Sdl.Community.MtEnhancedProvider.ViewModel.MainWindowViewModel.Save(Object window)
   bij Sdl.Community.MtEnhancedProvider.Commands.RelayCommand.Execute(Object parameter)
   bij MS.Internal.Commands.CommandHelpers.CriticalExecuteCommandSource(ICommandSource commandSource, Boolean userInitiated)
   bij System.Windows.Controls.Primitives.ButtonBase.OnClick()
   bij System.Windows.Controls.Button.OnClick()
   bij System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   bij System.Windows.UIElement.OnMouseLeftButtonUpThunk(Object sender, MouseButtonEventArgs e)
   bij System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   bij System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   bij System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   bij System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   bij System.Windows.UIElement.ReRaiseEventAs(DependencyObject sender, RoutedEventArgs args, RoutedEvent newEvent)
   bij System.Windows.UIElement.OnMouseUpThunk(Object sender, MouseButtonEventArgs e)
   bij System.Windows.Input.MouseButtonEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   bij System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target)
   bij System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
   bij System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
   bij System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
   bij System.Windows.UIElement.RaiseTrustedEvent(RoutedEventArgs args)
   bij System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted)
   bij System.Windows.Input.InputManager.ProcessStagingArea()
   bij System.Windows.Input.InputManager.ProcessInput(InputEventArgs input)
   bij System.Windows.Input.InputProviderSite.ReportInput(InputReport inputReport)
   bij System.Windows.Interop.HwndMouseInputProvider.ReportInput(IntPtr hwnd, InputMode mode, Int32 timestamp, RawMouseActions actions, Int32 x, Int32 y, Int32 wheel)
   bij System.Windows.Interop.HwndMouseInputProvider.FilterMessage(IntPtr hwnd, WindowMessage msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   bij System.Windows.Interop.HwndSource.InputFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   bij MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   bij MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
   bij System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   bij System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
   bij System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
   bij MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
   bij System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   bij System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   bij System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   bij System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   bij System.Windows.Forms.Application.RunDialog(Form form)
   bij System.Windows.Forms.Form.ShowDialog(IWin32Window owner)
   bij Sdl.Desktop.Platform.WinForms.SettingsDialogForm.Sdl.Desktop.Platform.InternalUI.IDialog.ShowDialog(IWin32Window owner)
   bij Sdl.Desktop.Platform.Implementation.Settings.SettingsDialog.ShowDialog(IWin32Window owner)
   bij Sdl.Desktop.Platform.Implementation.StudioWindow.ShowUserSettingsDialog()
   bij Sdl.Desktop.Platform.Implementation.Actions.ViewOptionsAction.Execute()
   bij Sdl.Desktop.Platform.Implementation.CommandBars.ActionService.<>c__DisplayClass30_0.<ExecuteAction>b__0()
   bij Sdl.Desktop.Logger.Log.Resources(Object message, Action action)
   bij Sdl.Desktop.Platform.Implementation.CommandBars.ActionService.ExecuteAction(IAction action, ActionOrigin origin, Boolean allowToggle)
   bij Sdl.Desktop.Platform.WinForms.IgCommandBarAction.Execute()
   bij Sdl.Desktop.Platform.WinForms.IgCommandBarAction._lazyButtonTool_ToolClick(Object sender, ToolClickEventArgs e)
   bij Infragistics.Win.UltraWinToolbars.ToolBase.OnToolClick(ToolClickEventArgs e)
   bij Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.OnToolClick(ToolClickEventArgs e)
   bij Infragistics.Win.UltraWinToolbars.UltraToolbarsManager.FireEvent(ToolbarEventIds id, EventArgs e)
   bij Infragistics.Win.UltraWinToolbars.ToolBase.OnToolClick()
   bij Infragistics.Win.UltraWinToolbars.ToolMenuItem.OnClick()
   bij Infragistics.Win.UltraWinToolbars.PopupMenuItemUIElement.DoClickProcessing(MouseEventArgs e)
   bij Infragistics.Win.UltraWinToolbars.PopupMenuItemUIElement.OnMouseUp(MouseEventArgs e)
   bij Infragistics.Win.TextUIElementBase.OnMouseUp(MouseEventArgs e)
   bij Infragistics.Win.ControlUIElementBase.ProcessMouseUpHelper(Object sender, MouseEventArgs e)
   bij Infragistics.Win.ControlUIElementBase.ProcessMouseUp(Object sender, MouseEventArgs e)
   bij Infragistics.Win.Utilities.ProcessEvent(Control control, ProcessEvent eventToProcess, EventArgs e)
   bij Infragistics.Win.UltraWinToolbars.UltraToolbarsDockArea.OnMouseUp(MouseEventArgs e)
   bij System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   bij System.Windows.Forms.Control.WndProc(Message& m)
   bij System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   bij System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   bij System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)]]></StackTrace>
  </Exception>
  <Environment>
    <ProductName>SDL Trados Studio</ProductName>
    <ProductVersion>Studio16</ProductVersion>
    <EntryAssemblyFileVersion>16.0.2.3343</EntryAssemblyFileVersion>
    <OperatingSystem>Microsoft Windows 10 Home</OperatingSystem>
    <ServicePack>NULL</ServicePack>
    <OperatingSystemLanguage>1043</OperatingSystemLanguage>
    <CodePage>1252</CodePage>
    <LoggedOnUser>LAPTOP-RBB1UCDG\helse</LoggedOnUser>
    <DotNetFrameWork>4.0.30319.42000</DotNetFrameWork>
    <ComputerName>LAPTOP-RBB1UCDG</ComputerName>
    <ConnectedToNetwork>True</ConnectedToNetwork>
    <PhysicalMemory>8265972 MB</PhysicalMemory>
  </Environment>
</SDLErrorDetails>

I tried it with the normal and the beta version of the MT Enhanced Trados Plugin, but both don't work.

Any idea what to do?

Thanks