When I use the killheli command I get this the heli shows getting killed but continues on but is now 100% unkillable and acts dumb.

When anyone shoots or takes down the heli this also shows an error in the console for Helli Control

 Failed to call hook 'cmdKillHeli' on plugin 'HeliControl v1.4.5' (NullReferenceException: Object reference not set to an instance of an object)
  at PatrolHelicopter.OnKilled (HitInfo info) [0x00090] in <1eb6b258fe9043a497c2ba2a601c6e2c>:0 
  at BaseCombatEntity.DieInstantly () [0x00049] in <1eb6b258fe9043a497c2ba2a601c6e2c>:0 
  at Oxide.Plugins.HeliControl.KillAllHelis (System.Boolean isForced) [0x00061] in <db58edd6bc5e40cb8794f7f996d683ce>:0 
  at Oxide.Plugins.HeliControl.cmdKillHeli (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x00031] in <db58edd6bc5e40cb8794f7f996d683ce>:0 
  at Oxide.Plugins.HeliControl.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01950] in <db58edd6bc5e40cb8794f7f996d683ce>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <cd9a02fd331347bd82d550bb1a9c8e9f>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <b76ec77c47d1449e92b2baab8603843d>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <b76ec77c47d1449e92b2baab8603843d>:0

I'm also getting the same error.

Failed to call hook 'cmdKillHeli' on plugin 'HeliControl v1.4.5' (NullReferenceException: Object reference not set to an instance of an object)
  at PatrolHelicopter.OnKilled (HitInfo info) [0x00090] in <404213086c2945d2949565b4ef491c1a>:0 
  at BaseCombatEntity.DieInstantly () [0x00049] in <404213086c2945d2949565b4ef491c1a>:0 
  at Oxide.Plugins.HeliControl.KillAllHelis (System.Boolean isForced) [0x00061] in <6cb2961cb6f946129484d8402c3fc45a>:0 
  at Oxide.Plugins.HeliControl.cmdKillHeli (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x00031] in <6cb2961cb6f946129484d8402c3fc45a>:0 
  at Oxide.Plugins.HeliControl.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01950] in <6cb2961cb6f946129484d8402c3fc45a>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <87ce9ac9776a48658bc55eae6debe38b>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <18d4f19bbc844191b11ed9e69284d09b>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <18d4f19bbc844191b11ed9e69284d09b>:0​

This is still an issue, unable to use plugin!