Failed to call hook

Failed to call hook 'OnEntityKill' on plugin 'VirtualVending v1.0.2' (NullReferenceException: Object reference not set to an instance of an object.)
  at Oxide.Plugins.VirtualVending+<>c__DisplayClass31_0.<OnEntityKill>b__0 (VendingMachine x) [0x00000] in <f3266d426bcc4c22b319c94795355247>:0 
  at System.Linq.Enumerable.TryGetFirst[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate, System.Boolean& found) [0x0003f] in <8b0c76c7efa244bc95eeee75bf1314cd>:0 
  at System.Linq.Enumerable.FirstOrDefault[TSource] (System.Collections.Generic.IEnumerable`1[T] source, System.Func`2[T,TResult] predicate) [0x00000] in <8b0c76c7efa244bc95eeee75bf1314cd>:0 
  at Oxide.Plugins.VirtualVending.OnEntityKill (VendingMachine machine) [0x0000d] in <f3266d426bcc4c22b319c94795355247>:0 
  at Oxide.Plugins.VirtualVending.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x005be] in <f3266d426bcc4c22b319c94795355247>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <112d89ea5d3348c8b949af0ab1a866d2>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <112d89ea5d3348c8b949af0ab1a866d2>:0 

I had this come in console then my server crashed 

Changed Status from Pending to Cant Reproduce