Crash in single player mode

[polycone]

NetworkPlatformException: Client not connected
  at MultiplayerMod.Platform.Steam.Network.SteamClient.Send (MultiplayerMod.Multiplayer.Commands.IMultiplayerCommand command, MultiplayerMod.Network.MultiplayerCommandOptions options) [0x0002f] in <9105f1966f814bf8afaf6c38d9c5672b>:0 
  at MultiplayerMod.Multiplayer.CoreOperations.Binders.GameEventsBinder.<BindTools>b__9_2 (MultiplayerMod.Game.UI.Tools.Events.BuildEventArgs args) [0x0000c] in <9105f1966f814bf8afaf6c38d9c5672b>:0 
  at MultiplayerMod.Game.UI.Tools.Events.BuildEvents.BuildComplete (BuildTool tool, System.Int32 cell, System.Boolean instantBuild, System.Boolean replaced) [0x0003b] in <9105f1966f814bf8afaf6c38d9c5672b>:0 
  at (wrapper dynamic-method) BuildTool.BuildTool.TryBuild_Patch0(BuildTool,int)
  at BuildTool.OnDragTool (System.Int32 cell, System.Int32 distFromOrigin) [0x00000] in -\BuildTool.cs:305 
  at DragTool.AddDragPoint (UnityEngine.Vector3 cursorPos) [0x0002a] in -\DragTool.cs:422 
  at DragTool.OnLeftClickDown (UnityEngine.Vector3 cursor_pos) [0x000f0] in -\DragTool.cs:159 
  at BuildTool.OnLeftClickDown (UnityEngine.Vector3 cursor_pos) [0x00000] in -\BuildTool.cs:465 
  at PlayerController.OnKeyDown (KButtonEvent e) [0x000f5] in -\PlayerController.cs:316 
  at KInputHandler.HandleKeyDown (KButtonEvent e) [0x0001c] in -\KInputHandler.cs:193 
  at KInputHandler.HandleKeyDown (KButtonEvent e) [0x0006f] in -\KInputHandler.cs:205 
  at KInputHandler.HandleEvent (KInputEvent e) [0x00008] in -\KInputHandler.cs:180 
  at KInputController.Dispatch () [0x00016] in -\KInputController.cs:306 
  at KInputManager.Dispatch () [0x00009] in -\KInputManager.cs:98 
  at KInputManager.Update () [0x0002e] in -\KInputManager.cs:88 
  at GameInputManager.Update () [0x000ce] in -\GameInputManager.cs:85 
  at Global.Update () [0x0005c] in -\Global.cs:594