Having this from time to time:

Creating item with less than 1 amount! (Scrap)
Failed to call hook 'CanStackItem' on plugin 'StackSizeController v2.0.4' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.StackSizeController.CanStackItem (Item item, Item targetItem) [0x00000] in <5bde604742044bf280cf597d8d992791>:0
  at Oxide.Plugins.StackSizeController.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00486] in <5bde604742044bf280cf597d8d992791>: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​