12:36 [Error] Failed to call hook 'OnEntityKill' on plugin 'WarCopter v1.4.2' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.WarCopter.OnEntityKill (BaseNetworkable entity) [0x00000] in <40bf405534cf4fd1a3b8b3ffb5952685>:0
at Oxide.Plugins.WarCopter.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002ab] in <40bf405534cf4fd1a3b8b3ffb5952685>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in :0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in :0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in :0

Failed to call hook 'OnEntityKill' on plugin 'WarCopter v1.4.4' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.WarCopter.OnEntityKill (BaseNetworkable entity) [0x00000] in :0
  at Oxide.Plugins.WarCopter.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002ab] in :0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <80b90e8213db44b29ec2d4111764172c>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in :0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in :0

I get this same error in the console. This was with no one on the server. I'm not sure what deatails I can provide to help with this. Please let me know if configs or logs will help.

Failed to call hook 'OnEntityKill' on plugin 'WarCopter v1.4.4' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.WarCopter.OnEntityKill (BaseNetworkable entity) [0x00000] in <e439095509da474aa7bcd3a7e4e266cb>:0

  at Oxide.Plugins.WarCopter.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002ab] in <e439095509da474aa7bcd3a7e4e266cb>:0

  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <e23ba2c0f246426296d81c842cbda3af>:0

  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <50629aa0e75d4126b345d8d9d64da28d>:0

  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <50629aa0e75d4126b345d8d9d64da28d>:0

I would just love to know what you were doing at the time.

I wasn't doing anything at the time this occured, no one was on the server at the time. Only the admins and moderators have permissions for WarCopter, none have been spawned in. We typically use normal mini copters. 

Merged post

I don't even know how to reproduce this error. I see it on both of my server when none exist on the server. If I can recreate the error I'll let you know.

13:37 [Error] Failed to call hook 'OnEntityKill' on plugin 'WarCopter v1.4.4' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.WarCopter.OnEntityKill (BaseNetworkable entity) [0x00000] in <d26c5aae679a4f1389a215782e0a3d7a>:0 
  at Oxide.Plugins.WarCopter.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x002ab] in <d26c5aae679a4f1389a215782e0a3d7a>: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 

not sure about the issue but seems convoy...