我不断收到类型错误：无法读取未定义的属性“缓存”

我在 discord.js 中创建了这个不和谐的欢迎器，但我不断收到此错误：

常量消息 = welcome <@${member.id}> to music and chill! please read the ${member.guild.channel.cache.get(ruleschannel).toString()}; ^

类型错误：无法读取未定义的属性“缓存”

这是我的代码：

module.exports = (client) => {
   const channelid = "865471665168580628";
   client.on("guildMemberAdd", (member) => {
       const serverid = member.guild.id
       const guild = client.guilds.cache.get(serverid.toString());

       console.log("member");
       const ruleschannel = guild.channels.cache.find(channel => channel.name === "rules");

       const message = `welcome <@${member.id}> to music and chill! please read the ${member.guild.channel.cache.get(ruleschannel).toString()}`;

       const channel = member.guild.channels.cache.get(channelid);
       channel.send(message);
   })
}

我阅读了很多问题和大量答案，但没有任何帮助，有人可以帮助我吗？