hi im being spammed with this error a lot 

Failed to call hook 'OnPlayerAttack' on plugin 'HitIcon v2.0.1' (NullReferenceException: )
  at (wrapper managed-to-native) UnityEngine.MonoBehaviour.CancelInvoke(UnityEngine.MonoBehaviour,string)
  at UnityEngine.MonoBehaviour.CancelInvoke (System.String methodName) [0x00001] in <c9bf70caf60f496295a2d6046da3e3c9>:0

  at Oxide.Plugins.HitIcon+UIHandler.DestroyUI () [0x00008] in <8d300627300b48c59825c93a969017ed>:0

  at Oxide.Plugins.HitIcon.GuiDisplay (BasePlayer player, System.String color, HitInfo hitinfo, System.Boolean isKill, System.String whatIsIt, System.Boolean isHead) [0x0003f] in <8d300627300b48c59825c93a969017ed>:0

  at Oxide.Plugins.HitIcon.SendHit (BasePlayer attacker, HitInfo info) [0x001db] in <8d300627300b48c59825c93a969017ed>:0

  at Oxide.Plugins.HitIcon.OnPlayerAttack (BasePlayer attacker, HitInfo hitinfo) [0x00000] in <8d300627300b48c59825c93a969017ed>:0

  at Oxide.Plugins.HitIcon.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00151] in <8d300627300b48c59825c93a969017ed>:0

  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <87ce9ac9776a48658bc55eae6debe38b>:0

  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <cd7231f30b444d86bc6cca8a53cdd2ea>:0

  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <cd7231f30b444d86bc6cca8a53cdd2ea>:0