Failed to call hook 'OnEntityDeath' on plugin 'DeathNotes v6.3.8' (NullReferenceException: )
  at (wrapper managed-to-native) UnityEngine.Component.GetComponentFastPath(UnityEngine.Component,System.Type,intptr)
  at UnityEngine.Component.GetComponent[T] () [0x00021] in <0b31faaf1c50461d95c83ac166a20393>:0

  at Oxide.Plugins.DeathNotes.GetWeaponName (Oxide.Plugins.DeathNotes+DeathData deathData) [0x00051] in <d906bbc0e27a4fc78ac0d4f8daee0392>:0

  at Oxide.Plugins.DeathNotes.GetCustomizedWeaponName (Oxide.Plugins.DeathNotes+DeathData deathData) [0x00000] in <d906bbc0e27a4fc78ac0d4f8daee0392>:0

  at Oxide.Plugins.DeathNotes.PopulateMessageVariables (System.String message, Oxide.Plugins.DeathNotes+DeathData data) [0x000ec] in <d906bbc0e27a4fc78ac0d4f8daee0392>:0

  at Oxide.Plugins.DeathNotes.OnEntityDeath (BaseCombatEntity victimEntity, HitInfo hitInfo) [0x000e6] in <d906bbc0e27a4fc78ac0d4f8daee0392>:0

  at Oxide.Plugins.DeathNotes.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0017c] in <d906bbc0e27a4fc78ac0d4f8daee0392>: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

I receive the same error.

This is a Death Notes error and should have been fixed in version 6.5.5.