NullReferenceException at OnServerInitializedError
So I changed the name in the config file 

{
  "Give default items upon respawn if the players is having items restored": false,
  "Can drop active item on death": false,
  "Percentage of total items lost (Permission Name | Percentage (0 - 100))": {
    "restoreupondeath.default": {
      "Belt": 75,
      "Wear": 75,
      "Main": 75
    },
    "restoreupondeath.beltonly": {
      "Belt": 100,
      "Wear": 0,
      "Main": 0
    },
    "restoreupondeath.admin": {
      "Belt": 0,
      "Wear": 0,
      "Main": 0
    }
  },
  "Version": {
    "Major": 0,
    "Minor": 3,
    "Patch": 0
  }
}​

and I got this what am I doing wrong ?

Unloaded plugin RestoreUponDeath v0.3.1 by k1lly0u
(16:39:56) | Failed to call hook 'OnServerInitialized' on plugin 'RestoreUponDeath v0.3.1' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.RestoreUponDeath.OnServerInitialized () [0x0004c] in <e6a37797c94f49da92c043129a6d9458>:0
  at Oxide.Plugins.RestoreUponDeath.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00100] in <e6a37797c94f49da92c043129a6d9458>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <efb9a8684e344ecfa065c7b416e6d2fd>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <b0a93b504f034a0db8b1c3d2503c0987>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <b0a93b504f034a0db8b1c3d2503c0987>:0
(16:39:56) | Loaded plugin RestoreUponDeath v0.3.1 by k1lly0u
can someone pase a proper config file so I can see it please?

{
  "Give default items upon respawn if the players is having items restored": false,
  "Can drop active item on death": false,
  "Percentage of total items lost (restoreupondeathwipe | Percentage (0 - 100))": {
    "restoreupondeath.default": {
      "Belt": 75,
      "Wear": 75,
      "Main": 75
    },
    "restoreupondeath.beltonly": {
      "Belt": 100,
      "Wear": 0,
      "Main": 0
    },
    "restoreupondeath.admin": {
      "Belt": 0,
      "Wear": 0,
      "Main": 0
    }
  },
  "Version": {
    "Major": 0,
    "Minor": 3,
    "Patch": 1
  }
}​