Quobject.EngineIoClientDotNet.Client.EngineIOException: Transport not open

[GMetaxakis]

Quobject.EngineIoClientDotNet.Client.EngineIOException: Transport not open
   en Quobject.EngineIoClientDotNet.Client.Transport.Send(ImmutableList`1 packets)
   en Quobject.EngineIoClientDotNet.Client.Socket.Flush()
   en Quobject.EngineIoClientDotNet.Client.Socket.SendPacket(Packet packet, Action fn)
   en Quobject.EngineIoClientDotNet.Client.Socket.<SetPing>b__65_0()
   en Quobject.EngineIoClientDotNet.Thread.EasyTimer.<>c__DisplayClass2_0.<SetTimeout>b__0()
   en System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   en System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   en System.Threading.Tasks.AwaitTaskContinuation.RunCallback(ContextCallback callback, Object state, Task& currentTask)
--- Fin del seguimiento de la pila de la ubicación anterior donde se produjo la excepción ---
   en System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   en System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   en System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   en System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   en System.Threading.ThreadPoolWorkQueue.Dispatch()