（Discord v14） discord bot 不回复消息 pong [duplicate]

问：

我正在制作一个简单的 discord 机器人，它回复某些消息，例如某些用户说“ping”，而不是机器人回复消息“pong”，所以这是源代码

const { Client, Events, GatewayIntentBits, Message } = require('discord.js');
const { token } = require('./config.json');

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

// When the client is ready, run this code (only once)
// We use 'c' for the event parameter to keep it separate from the already defined 'client'
client.once(Events.ClientReady, c => {
    console.log(`Ready! Logged in as ${c.user.tag}`);
});
//client.on("debug", console.log)

client.on('messageCreate', (message => {
    if (message.content === 'ping') {
        message.reply('pong')
    }
}))

client.on('error', console.error);

// Log in to Discord with your client's token
client.login(token);```

when I tested I said ping on the discord chat but the bot didn't replied. I gave the bot admin permission so there should not be a permission problem can anybody give me some answer about this problem?
the version of discord.js is **[email protected]**