Solved Specified cast is not valid

I'm trying to create a custom help plugin for my server and when I uploaded it to my server, I get this message.
Screenshot

 

I'm using code from another plugin to help with this, but I figure since I'm the only one using it, there shouldn't be an issue.

Code:

using Oxide.Game.Rust.Libraries;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json;
using UnityEngine;
using System.Linq;
using Oxide.Core;
using System;namespace Oxide.Plugins
{    [Info("Help Text", "Alpha Toon", "1.0.0")]
    class HelpText : RustPlugin
    {        #region Configuration Data        private bool configChanged;        // Plugin settings
        private const string DefaultChatPrefix = "Alpha Gaming";
        private const string DefaultChatPrefixColor = "#008000ff";        public string ChatPrefix { get; private set; }
        public string ChatPrefixColor { get; private set; }        //Plugin options
        private const string DefaultHelpText = "Insert text here";        public string HelpText { get; private set; }        #endregion        private void Init() => LoadConfigValues();
        protected override void LoadDefaultConfig() => PrintWarning("New configuration file created.")        [ChatCommand("help")]
        private void Help(BasePlayer player, string command, string[] args)
        {
            SendMessage(player, HelpText)
        }        private void LoadConfigValues()
        {
            // Plugin settings
            ChatPrefix = GetConfigValue("Settings", "ChatPrefix", DefaultChatPrefix);
            ChatPrefixColor = GetConfigValue("Settings", "ChatPrefixColor", DefaultChatPrefixColor);
           
            //Plugin options
            HelpText = GetConfigValue("Messages", "HelpText", DefaultHelpText);            if (!configChanged) return;
            PrintWarning("Configuration file updated.");
            SaveConfig();
        }        private T GetConfigValue<T>(string category, string setting, T defaultValue)
        {
            var data = Config[category] as Dictionary<string, object>;
            object value;
            if (data == null)
            {
                data = new Dictionary<string, object>();
                Config[category] = data;
                configChanged = true;
            }
            if (data.TryGetValue(setting, out value)) return (T)Convert.ChangeType(value, typeof(T));
            value = defaultValue;
            data[setting] = value;
            configChanged = true;
            return (T)Convert.ChangeType(value, typeof(T));
        }        private void SetConfigValue<T>(string category, string setting, T newValue)
        {
            var data = Config[category] as Dictionary<string, object>;
            object value;
            if (data != null && data.TryGetValue(setting, out value))
            {
                value = newValue;
                data[setting] = value;
                configChanged = true;
            }
            SaveConfig();
        }        private void SendMessage(BasePlayer player, string message, params object[] args) => player?.SendConsoleCommand("chat.add", -1, string.Format($"<color={ChatPrefixColor}>{ChatPrefix}</color>: {message}", args), 1.0);
    }
}

 

After adding the plugin to the server, it didn't seem to create a config/.json file.

 

I'm just going to scrap the idea of having a config file for myself as I guess it's more complicated that it seems to me. I think it'll be easier for me just to add what I want directly into the file. Thanks for the help though.

 

If I'm not mistaken then you're missing multiple semicolons:
protected override void LoadDefaultConfig() => PrintWarning("New configuration file created.")
SendMessage(player, HelpText)

 

I have found an alternative to what I originally was using, but the config file is left blank even though I defined what should be put into the file.

 

Fixed it myself.