Failed to call hook 'ccmdDangerousTreasures' on plugin 
'DangerousTreasures v2.2.9' (NullReferenceException: Object reference 
not set to an instance of an object)
  at Oxide.Plugins.DangerousTreasures.ccmdDangerousTreasures 
(ConsoleSystem+Arg arg) [0x0005c] in :0

  at Oxide.Plugins.DangerousTreasures.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00ce8] in :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 :0

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

fixed in 2.3.0 thanks!