Solved NullReferenceException in my plugin

Hello guys i have problem

Code:

[Error] Failed to call hook 'conscmd' on plugin 'DeployBlock v1.0.0' (NullReferenceException: Object reference not set to an instance of an object)
(17:57:14) | [Oxide] 12:57 [Debug]   at Oxide.Plugins.DeployBlock.conscmd (.Arg arg) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.DeployBlock.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0

I dont know, what me do, please help me.

 

Code:

 [ConsoleCommand("deployblock")]
        void conscmd(ConsoleSystem.Arg arg)
        {
            var player = arg.connection?.player as BasePlayer;
            if (!player.IsAdmin()) return;
            if (arg.Args==null) return;
            if (arg.Args.Length == 2 && arg.Args[0] == "start")
            {
                int min;
                if(!Int32.TryParse(arg.Args[1], out min)) return;
                data.minutes = min;
                data.blocked = true;
                timingFile.WriteObject(data);
            }
            if (arg.Args.Length ==1 && arg.Args[0] == "stop")
            {
                data.blocked = false;
                timingFile.WriteObject(data);

 

Code:

if (!player==null)return;

It will be so?

 

I dont see message of eror, but plugin dont work, how do it? Please help me.

 

If i in game that it's work, if i use rcon console and i out of game it's dont work
[DOUBLEPOST=1477583215][/DOUBLEPOST]Thanks your Wolf for your Attention and help.