Discord密钥机器人TypeError报错排查与解决

数据老陈

2026-7-28

问题描述

开发Discord密钥机器人时，反复触发两类TypeError报错：

UNCAUGHT EXCEPTION - keeping process alive: TypeError: Cannot read properties of undefined (reading 'client')
UNCAUGHT EXCEPTION - keeping process alive: TypeError: Cannot read properties of undefined (reading 'type')

尝试删除疑似问题代码后仍未解决，最终排查出是discord.js版本更新引发的兼容异常，将MessageEmbed替换为RichEmbed后问题修复。

报错关联代码

let a = "`"
const tosend = new Discord.MessageEmbed(client)
.setColor('#0099ff')
.setTitle('Whitelist')
.setDescription(`Your Key Your Key Is ${a}${key}${a}`)
.setFooter("TIP: Always save your key, you cannot use until registered")

完整错误栈

UNCAUGHT EXCEPTION - keeping process alive: TypeError: Cannot read properties of undefined (reading 'type')
    at MessageEmbed.setup (C:\Users\User\3D Objects\src\main\Bot\node_modules\discord.js\src\structures\MessageEmbed.js:29:22)
    at new MessageEmbed (C:\Users\User\3D Objects\src\main\Bot\node_modules\discord.js\src\structures\MessageEmbed.js:21:10)
    at module.exports.run (C:\Users\User\3D Objects\src\main\Bot\commands\whitelist.js:35:17)
    at Client.<anonymous> (C:\Users\User\3D Objects\src\main\Bot\index.js:48:34)
    at Client.emit (node:events:513:28)
    at MessageCreateHandler.handle (C:\Users\User\3D Objects\src\main\Bot\node_modules\discord.js\src\client\websocket\packets\handlers\MessageCreate.js:9:34)
    at WebSocketPacketManager.handle (C:\Users\User\3D Objects\src\main\Bot\node_modules\discord.js\src\client\websocket\packets\WebSocketPacketManager.js:108:65)
    at WebSocketConnection.onPacket (C:\Users\User\3D Objects\src\Bot\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:336:35)
    at WebSocketConnection.onMessage (C:\Users\User\3D Objects\src\Bot\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:299:17)
    at WebSocket.onMessage (C:\Users\3D Objects\srcmain\Bot\node_modules\ws\lib\event-target.js:120:16)

解决方案

discord.js版本更新后，MessageEmbed的初始化逻辑或内部实现存在兼容问题，将代码中的Discord.MessageEmbed替换为Discord.RichEmbed即可修复报错。修改后的代码示例：

let a = "`"
const tosend = new Discord.RichEmbed()
.setColor('#0099ff')
.setTitle('Whitelist')
.setDescription(`Your Key Your Key Is ${a}${key}${a}`)
.setFooter("TIP: Always save your key, you cannot use until registered")

内容的提问来源于stack exchange，提问作者Im Okay At life