08:30 [Error] Failed to call hook 'OnEntityTakeDamage' on plugin 'CupboardNoDecay v1.0.8' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Core.ExtensionMethods.Contains[T] (T[] array, T value) [0x00029] in <4452f821def6406d834e4149849fe7ea>:0
  at Oxide.Plugins.CupboardNoDecay.OnEntityTakeDamage (BaseCombatEntity entity, HitInfo hitInfo) [0x0007f] in <94e5f61ed9404679a80241e3b131c8d5>:0
  at Oxide.Plugins.CupboardNoDecay.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00090] in <94e5f61ed9404679a80241e3b131c8d5>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0

Oxide.Rust 2.0.4099

Version 1.1.0 attempts to hide this error message.  However, if you have any idea what entity may have been being checked when this happens please let me know.

Failed to call hook 'OnEntityTakeDamage' on plugin 'CupboardNoDecay v1.1.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Core.ExtensionMethods.Contains[T] (T[] array, T value) [0x00029] in <4452f821def6406d834e4149849fe7ea>:0

  at Oxide.Plugins.CupboardNoDecay.OnEntityTakeDamage (BaseCombatEntity entity, HitInfo hitInfo) [0x0008f] in <21d09e2c96024f838b40e7edd618fab9>:0

  at Oxide.Plugins.CupboardNoDecay.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00090] in <21d09e2c96024f838b40e7edd618fab9>:0

  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0

  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0

  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0

You might need to add "minicopter.entity" to your NeverDecay section in the config file.