Crashes when sending to 3ds xl

[sirenianprime]

Whenever I try to send a theme via wifi, I get the following crash report:

System.Net.Sockets.SocketException (0x80004005): An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.Send(Byte[] buffer, Int32 offset, Int32 size, SocketFlags socketFlags)
at ThemeEditor.WPF.MainWindow.<>c__DisplayClass131_0.<SendTheme_Execute>b__0() in D:\GIT\Projects\3DS Theme Editor\ThemeEditor.WPF\MainWindow.Themes.cs:line 691
at System.Threading.Tasks.Task1.InnerInvoke() at System.Threading.Tasks.Task.Execute() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at ThemeEditor.WPF.RelayCommandAsync2.d__11.MoveNext() in D:\GIT\Projects\3DS Theme Editor\ThemeEditor.WPF\RelayCommand.cs:line 0
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.b__6_0(Object state)
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)