@dirkroel Could you please attach the error log? We have to check.

@dirkroel Thanks you for the feedback. we will check it and response you as soon as possible.

@dirkroel

It may be a false positive because the task can be deleted normally.

We don't have a plan to make a new windows version currently, but after finishing the release of iPhone and Android app we will fix it.

Sorry for any inconvenience brought to you.

Whats happening guys, I'm like one of your biggest fans, but are you even doing any development anymore?

Apart from this the iPad still uses the extremely old version. Anyway this error is still there - how hard could it possibly be to fix?
I found the stack trace if that helps:

2017-04-02 18:53:43.4631 Doit.Business.HttpClient.HandleRequest Info: System.Net.WebException: The remote server returned an error: (404) Not Found.
at System.Net.HttpWebRequest.GetResponse()
at Doit.Business.HttpClient.HandleRequest(HttpWebRequest request) Api.UploadGoals => Api.UploadGoal => HttpClient.HandleRequest

2017-04-02 18:53:43.4631 Doit.Business.HttpClient.HandleError Error: Status: 404; Body: Cannot PUT /api/4/goals/delete/ Api.UploadGoal => HttpClient.HandleRequest => HttpClient.HandleError

2017-04-02 18:53:43.4631 Doit.im.ViewModel.MainViewModel.<InitWorkers>b__e0 Info: Upload Error is Unexpected character encountered while parsing value: C. Path '', line 0, position 0. BackgroundWorker.WorkerThreadStart => BackgroundWorker.OnDoWork => MainViewModel.<InitWorkers>b__e0

2017-04-02 18:54:27.5179 NLog.LoggerImpl.Write Error: Exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at Doit.im.ViewModel.DoitViewModelBase.TranshTask(Task task)
at Doit.im.ViewModel.MainViewModel.<get_TranshTaskCommand>b__2a(Object obj)
--- End of inner exception stack trace ---
at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
at GalaSoft.MvvmLight.Helpers.WeakAction`1.Execute(T parameter)
at GalaSoft.MvvmLight.Command.RelayCommand`1.Execute(Object parameter)
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) App.OnDispatcherUnhandledException => App.HandleException => LoggerImpl.Write
2017-04-02 18:54:27.5279 Doit.im.App.HandleException Error: Exception has been thrown by the target of an invocation. Dispatcher.CatchException => App.OnDispatcherUnhandledException => App.HandleException

@dirkroel Thank you very much for your detailed feedback!
Our engineers checked and found it not a small problem. We'll not just fix it in the current version, instead, we've decided to redesign and recode the windows version next to thoroughly fix the problem.

If you have any ideas or suggestions for the new design of windows version, you may tell us any time.
Have a great day!