Hi, 
we use the Murderers v.1.0.9 plugin. Every time we try one of the commands (/m.kill or murders.kill), we get the following error message:

Failed to call hook 'npcWipe' on plugin 'Murderers v1.0.9' (NullReferenceException: Object reference not set to an instance of an object)at Oxide.Plugins.Murderers.Delete () [0x0002a] in <92e6cdc2aebe4ecb9b56daff1d271ca1>:0
at Oxide.Plugins.Murderers.npcWipe (BasePlayer player) [0x0001c] in <92e6cdc2aebe4ecb9b56daff1d271ca1>:0
at Oxide.Plugins.Murderers.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x004d7] in <92e6cdc2aebe4ecb9b56daff1d271ca1>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <31122a27a2414cd799150f8677cf39d4>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <0fbce81d88d64454b3e7abb24df7026b>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <0fbce81d88d64454b3e7abb24df7026b>:0