NullReferenceException: Object reference not set to an instance of an object

| Failed to call hook 'OnRocketLaunched' on plugin 'TheDoorKnocker v1.4.3' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.TheDoorKnocker.SpawnRockets (BasePlayer player, System.Int32 amount, System.Int32 type) [0x0002d] in <b6703389163b47b79f1fc3f7fe4ab085>:0 
  at Oxide.Plugins.TheDoorKnocker.OnRocketLaunched (BasePlayer player, BaseEntity entity) [0x0021e] in <b6703389163b47b79f1fc3f7fe4ab085>:0 
  at Oxide.Plugins.TheDoorKnocker.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x003af] in <b6703389163b47b79f1fc3f7fe4ab085>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <122610edeac6402c8915b76845a2714f>: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

Just started on map wipe

Is the data file empty?

Well, without any information there's not much I can do.

Changed Status from Pending to No Response

dont have to be an ass.. some people work and cant answer right away 

yes nothing in the data file.. I unloaded the plugin .. I wiped both data and config and installed the new one and this is what I get