rulesMessage.js

const { Client, MessageActionRow, MessageButton, Intents } = require('discord.js');
const { token, rulesChannel } = require('./config.json');

const client = new Client({
    intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES, Intents.FLAGS.DIRECT_MESSAGES, Intents.FLAGS.GUILD_MESSAGE_REACTIONS],
    allowedMentions: { parse: ['roles', 'everyone', 'users'], repliedUser: true }
});

client.login(token);

client.once('ready', async () => {
    // const channel = (await client.channels.fetch(rulesChannel)).fetch();
    const channel = (await client.channels.fetch(rulesChannel));
    const row = new MessageActionRow().addComponents(new MessageButton()
        .setCustomId('join').setLabel('I agree').setStyle('PRIMARY'));

    const message = { content: 'Click the button below if you agree to the rules above and are ready to participate. If nothing happens within a minute and you don\'t see the other channels, please message one of the Leadership members.', components: [row] };
    await channel.send(message);

    // client.destroy();
});