(09:23:53) | Failed to call hook 'CanMoveItem' on plugin 'ChestStacks v1.3.3' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.ChestStacks.CanMoveItem (Item movedItem, PlayerInventory playerInventory, System.UInt32 targetContainerID, System.Int32 targetSlot, System.Int32 amount) [0x0027c] in <c1579cb848d14fd8ab833942316a45a3>:0 
  at Oxide.Plugins.ChestStacks.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000cd] in <c1579cb848d14fd8ab833942316a45a3>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <80b90e8213db44b29ec2d4111764172c>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ec05e0208c9149bba43236ca58fea105>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ec05e0208c9149bba43236ca58fea105>:0

Possibly fixed in 1.4.0+ new report needed if not fixed.