About Simple Kil Feed

When I run the Simple Kill Feed plug-in written by sabby, my console always outputs the following error:

Failed to call hook 'OnEntityDeath' on plugin 'SimpleKillFeed v2.1.2' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.SimpleKillFeed.GetWeaponName (HitInfo hitInfo) [0x00017] in <9479703431a046b796c2a1af29498c1b>:0

at Oxide.Plugins.SimpleKillFeed.GetCustomWeaponName (HitInfo hitInfo) [0x00000] in <9479703431a046b796c2a1af29498c1b>:0

at Oxide.Plugins.SimpleKillFeed.OnEntityDeath (BaseAnimalNPC victim, HitInfo hitInfo) [0x00086] in <9479703431a046b796c2a1af29498c1b>:0

at Oxide.Plugins.SimpleKillFeed.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0026e] in <9479703431a046b796c2a1af29498c1b>:0

at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <09575a60985045248bcb43b20faeeb99>:0

at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <bae5f1223fce49c493b01571c99dce02>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <bae5f1223fce49c493b01571c99dce02>:0
Is there anyone who can help me solve it?I would be grateful.