Error: Failed to call hook

I'm getting the following error when I detach a weapon attachment from a weapon.

(06:05:42) | Failed to call hook 'OnItemRemovedFromContainer' on plugin 'VendingBuys v1.0.5' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.VendingBuys.OnItemRemovedFromContainer (ItemContainer container, Item item) [0x00022] in <2ff4af317d0e4f86a1bce6891fe10f33>:0 
  at Oxide.Plugins.VendingBuys.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00144] in <2ff4af317d0e4f86a1bce6891fe10f33>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <09575a60985045248bcb43b20faeeb99>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <bae5f1223fce49c493b01571c99dce02>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <bae5f1223fce49c493b01571c99dce02>:0

Changed Status from Pending to Work in Progress

Changed Fixed In to Next Version

Changed Status from Work in Progress to Closed