TypeInitializationException-in-NeuroLab

System.TypeInitializationException: The type initializer for '†††
††‡Ž‹' threw an exception.
---> System.MissingMethodException: Method not found: 'System.String WealthLab.Core.Tokenizer.AppendToken(System.Object)'.
at †††
††‡š˜.†††
††‡š—.†††
††‡›(RuntimeTypeHandle )
at †††
††‡Ž‹..cctor()
--- End of inner exception stack trace ---
at WealthLab.NeuroLab.NetworkModel.Persist()
at WealthLab.NeuroLab.NetworkModel.EstablishBaseline()
at WealthLab.NeuroLab.cwNeuroLab.†††
††‡’—(String )
at WealthLab.NeuroLab.cwNeuroLab.Populate(Boolean maintainSelection)
at WealthLab.NeuroLab.cwNeuroLab..ctor()
at WealthLab.NeuroLab.NeuroLabExtension.†††
††‡”˜()
at WealthLab.NeuroLab.NeuroLabExtension.†††
††‡”—(Object , RoutedEventArgs )
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.Controls.MenuItem.InvokeClickAfterRender(Object arg)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)