问(节点:14688) UnhandledPromiseRejectionWarning: TypeError:无法读取null的属性“通道”

EN

    //music commands

function play(connection, message){
    var server = server[message.guild.id];

    server.dispatcher = connection.playStream(ytdl(server.queue[0], {filter: "audioonly"}));

    server.queue.shift();

    server.dispatcher.on("end",function(){
        if(server.queue[0]){
            play(connection, message);
        }else {
            connection.disconnect();
        }
    })
}


if(!args[1]){
    message.channel.send("Pls provide a link!");
    return;
}

if(message.member.voiceChannel){
    message.channel.send("u need 2 be in a channel");
    return;
}

if(!servers[message.guild.id]) servers[message.guild.id] = {
    queue: []
}

var server = servers[message.guild.id];

server.queue.push(args[1]);

if(!message.guild.voiceConnection) message.member.voice.channel.channel.join().then(function(connection){
    play(connection, message);
})