Plugin has been partially broken the last few days and has this error

08:08 [Error] Failed to call hook 'OnDispenserGather' on plugin 'GatherManager v2.2.78' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.GatherManager.OnDispenserGather (ResourceDispenser dispenser, BaseEntity entity, Item item) [0x00035] in <8060ac720c884454b9ab0f2833b536a1>:0 
  at Oxide.Plugins.GatherManager.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x001dd] in <8060ac720c884454b9ab0f2833b536a1>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <23ba99f131254889867c71f0bd137b1d>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <157a94ee66ab4a7991faecd1eb84be3b>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <157a94ee66ab4a7991faecd1eb84be3b>:0