Deployment without a manually uploaded node module folder didn't work

Ready!
Balance is satisfactory, currently 0.469175743382926796 ETH.
/app/index.js:50
channel.send({
^
TypeError: Cannot read properties of undefined (reading 'send')
at /app/index.js:50:13
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
Node.js v18.12.1

/// Dependancies ///
const { ethers } = require('ethers');
const { Client, GatewayIntentBits, EmbedBuilder } = require('discord.js');

/// Discord Token ///
const discordToken =
    'XXX';

/// Create a new client instance ///
const client = new Client({ intents: [GatewayIntentBits.Guilds] });

/// When the client is ready, run this code (only once) ///
client.once('ready', () => {
    console.log('Ready!');
});

/// Ethers Alchemy Provider ///
const provider = new ethers.AlchemyProvider(
    'homestead',
    'XXX'
);

const getBalance = async () => {
    provider
        .getBalance('
xxx')
        .then((balance) => {
            let ethBalance = ethers.formatEther(balance);
            const channel = client.channels.cache.get('XXX');
            if (ethBalance < 0.1) {
                let warningEmbed = new EmbedBuilder()
                    .setColor(0xff0000)
                    .setTitle('Balance Warning! Top up ASAP!')
                    .setDescription(`Current Balance: ${ethBalance} ETH`);

                console.log(
                    `WARNING: Balance is under 0.15 (${ethBalance} ETH), top up ASAP! Sending alert...`
                );
                channel.send({
                    content: 'XXX',
                    embeds: [warningEmbed],
                });
            } else {
                let standardEmbed = new EmbedBuilder()
                    .setColor(0x00ff00)
                    .setTitle('Balance Check')
                    .setDescription(`Current Balance: ${ethBalance}`);

                console.log(`Balance is satisfactory, currently ${ethBalance} ETH.`);

                channel.send({
                    embeds: [standardEmbed],
                });
            }
        });
};

/// Initialize Watcher ///
const startWatcher = async () => {
    await client.login(discordToken);
    getBalance();
    let getBalanceInterval = setInterval(getBalance, 21600000);
};

startWatcher();

const getBalance = async () => {
    const initBalance = await provider.getBalance('XXX')
            let ethBalance = ethers.formatEther(initBalance);

 TypeError: Cannot read properties of undefined (reading 'send')
at /app/index.js:50:13
at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
Node.js v18.12.1