Failed to call hook.

Failed to call hook 'OnRocketLaunched' on plugin 'TheDoorKnocker v1.4.3' (KeyNotFoundException: The given key '76561198067206689' was not present in the dictionary.)
  at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <8ce0bd04a7a04b4b9395538239d3fdd8>:0 
  at Oxide.Plugins.TheDoorKnocker.OnRocketLaunched (BasePlayer player, BaseEntity entity) [0x0002f] in <2af1e546ea184019820de7416a1a9f45>:0 
  at Oxide.Plugins.TheDoorKnocker.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x003af] in <2af1e546ea184019820de7416a1a9f45>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <206a0f2c6ee141f38e2ad549cde44d70>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <beb2b64691c64e2b95b99491bd85442c>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <beb2b64691c64e2b95b99491bd85442c>:0 


I just wanted to test the plugin on my test server.
Every time i fire a Rocket i get thi serror.

I havent deleted anything or whatever.