I got errorSolved
Failed to call hook 'OnEntityDeath' on plugin 'SimpleKillFeed v2.1.3' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.SimpleKillFeed.GetWeaponName (HitInfo hitInfo) [0x00017] in <b2ec37c6502b4f0ab9f4daebfb0b66a4>:0 
  at Oxide.Plugins.SimpleKillFeed.GetCustomWeaponName (HitInfo hitInfo) [0x00000] in <b2ec37c6502b4f0ab9f4daebfb0b66a4>:0 
  at Oxide.Plugins.SimpleKillFeed.OnEntityDeath (BaseAnimalNPC victim, HitInfo hitInfo) [0x00086] in <b2ec37c6502b4f0ab9f4daebfb0b66a4>:0 
  at Oxide.Plugins.SimpleKillFeed.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0026e] in <b2ec37c6502b4f0ab9f4daebfb0b66a4>: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'm getting the same error:

Failed to call hook 'OnEntityDeath' on plugin 'SimpleKillFeed v2.1.3' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.SimpleKillFeed.GetWeaponName (HitInfo hitInfo) [0x00017] in <2aea637ec6144b8ab67f8f2bbfa2e6cd>:0 
  at Oxide.Plugins.SimpleKillFeed.GetCustomWeaponName (HitInfo hitInfo) [0x00000] in <2aea637ec6144b8ab67f8f2bbfa2e6cd>:0 
  at Oxide.Plugins.SimpleKillFeed.OnEntityDeath (BaseAnimalNPC victim, HitInfo hitInfo) [0x00086] in <2aea637ec6144b8ab67f8f2bbfa2e6cd>:0 
  at Oxide.Plugins.SimpleKillFeed.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0026e] in <2aea637ec6144b8ab67f8f2bbfa2e6cd>: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
Locked automatically