Application crash error (NullReferenceException)

I got an error log below when starting UiPath Studio (version 2016.1.5999.19351).
But when I run the workflow, it works fine and no error appears.
I made the workflow with a newer version of UiPath (2016.2.6274.33252),
and ran it on another PC which has the old version of UiPath(2016.1.5999.19351).
How should I correspond to this error?

[ERROR] [Orchestra.LogHelper] [1] Application crashed | [NullReferenceException] System.NullReferenceException: Object reference not set to an instance of an object.
at System.Activities.Presentation.WorkflowViewElement.<.ctor>b__1(Object sender, RoutedEventArgs eventArgs)
at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.UIElement.RaiseEvent(RoutedEventArgs e)
at System.Windows.BroadcastEventHelper.BroadcastEvent(DependencyObject root, RoutedEvent routedEvent)
at System.Windows.BroadcastEventHelper.BroadcastUnloadedEvent(Object root)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)

Hi mkmk
I do have the same error message using Version 2016.2.6232. Do you meanwhile have a solution for this problem?