I periodically see such errors in the console, what is the reason for this?

Failed to call hook 'OnEntityDeath' on plugin 'SimpleKillFeed v2.2.8' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.SimpleKillFeed.GetWeaponName (HitInfo hitInfo) [0x00017] in <7a7f785c3ad24174a291f913570fc3f1>:0 
  at Oxide.Plugins.SimpleKillFeed.GetCustomWeaponName (HitInfo hitInfo) [0x00000] in <7a7f785c3ad24174a291f913570fc3f1>:0 
  at Oxide.Plugins.SimpleKillFeed.OnEntityDeath (BaseAnimalNPC victim, HitInfo hitInfo) [0x00084] in <7a7f785c3ad24174a291f913570fc3f1>:0 
  at Oxide.Plugins.SimpleKillFeed.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00324] in <7a7f785c3ad24174a291f913570fc3f1>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <795304323ac74a298b8ed190a1dfa739>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <beb2b64691c64e2b95b99491bd85442c>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0 ​