Can this work with the latest smart plug, hardware version v4?

[github22222]

I just got the latest v4 smart plug and it can turn the plug on and off using port number 49152 not 49153. However, the query action gives an unhandled exception:
Unhandled exception. System.ArgumentNullException: Value cannot be null. (Parameter 'source')
at System.Linq.ThrowHelper.ThrowArgumentNullException(ExceptionArgument argument)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at WemoNet.Communications.WemoPlug.VerifyWemoDevice(HttpWebRequest request, String reqContentSoap) in D:\Documents\C Sharp Code\Wemo.net-master\WemoCommunications\WemoNet\Communications\WemoPlug.cs:line 297
at WemoNet.Communications.WemoPlug.<>c__DisplayClass30_0.<b__1>d.MoveNext() in D:\Documents\C Sharp Code\Wemo.net-master\WemoCommunications\WemoNet\Communications\WemoPlug.cs:line 170
--- End of stack trace from previous location where exception was thrown ---
at System.Threading.Tasks.Task.<>c.b__139_1(Object state)
at System.Threading.QueueUserWorkItemCallbackDefaultContext.Execute()
at System.Threading.ThreadPoolWorkQueue.Dispatch()