Error when trying to fire rocket after typing commands

I get this error when trying to fire a rocket after typing /tdk true and /tdk 7. I have my config set to fire off 7 rockets. I gave the correct permissions to my oxide group "destroyer" then granted that group to myself. I'll include my config as well. The only way I get it to work is by logging off the server and logging on again then typing the commands again and crafting new rocket launchers. I do this a few times then it magically works.

- See attached for config

Failed to call hook 'OnRocketLaunched' on plugin 'TheDoorKnocker v1.4.3' (KeyNotFoundException: The given key '76561198059348841' was not present in the dictionary.)
  at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <f98723dd4586469db5213ec59da723ca>:0 
  at Oxide.Plugins.TheDoorKnocker.OnRocketLaunched (BasePlayer player, BaseEntity entity) [0x0002f] in <1dd03f036fd24aa891ed1c514afdee06>:0 
  at Oxide.Plugins.TheDoorKnocker.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x003af] in <1dd03f036fd24aa891ed1c514afdee06>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <42f9bedc659b4f4786eb778d3cd58968>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000de] in <8cb2d664f1574f2b96d53f1c1869d96a>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <8cb2d664f1574f2b96d53f1c1869d96a>:0 

TheDoorKnocker.json