I am a new rust plugin dev and im looking for some help when I do /servermessage nothing comes up and i get a error saying that failed to call hook and that index out of range. Everything else works.

using Oxide.Core;
using Oxide.Core.Configuration;
using Oxide.Game.Rust.Cui;
using ProtoBuf;
using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;

namespace Oxide.Plugins
{
    [Info("Test Rust Plugin", "Gunter", "0.0.1")]
    public class TestRustPlugin : RustPlugin
    {
        //On Plugin Loaded
        private void Loaded()
        {
            permission.RegisterPermission("TestRustPlugin.use", this);
        }



        //Commands
        [ChatCommand("servermessage")]
        void cmdServerMessage(BasePlayer player, string cmd, string[] args)
        {
            string shoutstring = args[0];
            if (permission.UserHasPermission(player.UserIDString, "TestRustPlugin.use"))
            {
                
                Server.Broadcast(shoutstring);
            }
            if (shoutstring.Length < 1)
            {
                rust.SendChatMessage(player, "Broadcast", "Syntax: /ServerMessage <message>");
            }                   
        }
    }
}​

yo need to check args length cause ifnull

string shoutstring = args[0];​

you will get an error.

You need to check if null, then string.join all the arguments. While your at it. It'd be ideal to add some regex checks or at least check again blacklisted words so you don't have a rogue user broadcasts hate messages.