Bot doesn't send message anymore and throws an error

Hello everyone.
Today, as a fun project, I tried making a Chatbot for the first time ever. I followed a tutorial, and i created it using Javascript and tmi.js. The bot worked fine at first, it would respond to 90% of my commands and would not crash. I tried hosting it on Heroku. Again, it worked fine at first, even if it seemed to crash sometimes, but i blamed that on me not knowing how to use Heroku properly. However, i tried launching the bot on my computer with NodeJs again (since it worked fine before). And here’s what i found :

  • The bot, using a console.log line i added for debugging, seems to be able to read messages and tells me it responded
  • In the chat, no message appears from the bot at all
  • Eventually, the bot crash and i get this error :
    const [raw, command, argument] = message.match(regexpCommand);

TypeError: object null is not iterable (cannot read property Symbol(Symbol.iterator))
    at client.<anonymous> (C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\server.js:47:38)
    at client.EventEmitter.emit (C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\node_modules\tmi.js\lib\events.js:94:44)
    at client.emits (C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\node_modules\tmi.js\lib\client.js:90:13)
    at client.handleMessage (C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\node_modules\tmi.js\lib\client.js:1117:13)
    at C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\node_modules\tmi.js\lib\client.js:1228:9
    at Array.forEach (<anonymous>)
    at client._onMessage (C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\node_modules\tmi.js\lib\client.js:1225:8)
    at WebSocket.onMessage (C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\node_modules\ws\lib\event-target.js:199:18)
    at WebSocket.emit (node:events:520:28)
    at Receiver.receiverOnMessage (C:\Users\natha\Desktop\MinouBot\twitch\oreminou-twitch-bot\node_modules\ws\lib\websocket.js:1137:20)

I’m not quite sure what is happening. It seems like it is having trouble with checking if the message it read is a command ?

Other information : The bot was not a moderator on the channel when i tested it

Again, i’m quite new to developping twitch chatbots, so any help or tip would be amazing.

Thanks a lot !

Here’s my full code :

const tmi = require('tmi.js');
const regexpCommand = new RegExp(/^!([a-zA-Z0-9]+)(?:\W+)?(.*)?/);

const commands = {
  * some commands *

const client = new tmi.Client({
  connection: {
    reconnect: true
  channels: [
  identity: {
  username: process.env.TWITCH_BOT_USERNAME,
  password: process.env.TWITCH_OAUTH_TOKEN


client.on('message', async (channel, context, message) => {
  client.on('message', async (channel, context, message) => {
    const isNotBot = context.username.toLowerCase() !== process.env.TWITCH_BOT_USERNAME.toLowerCase();

    if ( !isNotBot ) return;

    const [raw, command, argument] = message.match(regexpCommand);

    const { response } = commands[command] || {};

    if ( typeof response === 'function' ) {
      client.say(channel, response(argument));
    } else if ( typeof response === 'string' ) {
      client.say(channel, response);
    console.log("Responded to a message in chat");

If you’re using TMI try this instead
and see if this works for u i use TMI myself and see a lot that is not basic and for beginners to TMI or JavaScript

// Script requirements //

const tmi = require(‘tmi.js’);
const { channel } = require(‘tmi.js/lib/utils’);
//const { channel } = require(‘tmi.js/lib/utils’);

//(Use this if you use a .env)//
const opts = {
options: { debug: true,},
connection: {
reconnect: true,
secure: true,

//Channel / Bot login (replace process.env.USER_TOKEN with the needed info like bot username and auth token and youre channel info if you dont use a .env or testing) //

identity: {
    username: process.env.USER_TOKEN,
    password: process.env.AUTH_TOKEN
channels: [ process.env.CHANNEL_TOKEN ]


//Bot Connected to twitch //
const client = new tmi.client(opts);
client.on(‘connected’, (channel, address, port) => {
client.say(process.env.CHANNEL_TOKEN, ‘Hello world!’)