Error: FFMPEG not found

const { Client, Util } = require('discord.js');
const { TOKEN, PREFIX, GOOGLE_API_KEY } = require('./config');
const YouTube = require('simple-youtube-api');
const ytdl = require('ytdl-core');

const client = new Client({ disableEveryone: true });

const youtube = new YouTube(GOOGLE_API_KEY);

const queue = new Map();

require('http').createServer().listen(3000)


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

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

client.on('ready', () => console.log('Yo this ready!'));

client.on('disconnect', () => console.log('I just disconnected, making sure you know, I will reconnect now...'));

client.on('reconnecting', () => console.log('I am reconnecting now!'));

client.on('message', async msg => { // eslint-disable-line
    if (msg.author.bot) return undefined;
    if (!msg.content.startsWith(PREFIX)) return undefined;

    const args = msg.content.split(' ');
    const searchString = args.slice(1).join(' ');
    const url = args[1] ? args[1].replace(/<(.+)>/g, '$1') : '';
    const serverQueue = queue.get(msg.guild.id);

    let command = msg.content.toLowerCase().split(' ')[0];
    command = command.slice(PREFIX.length)

    if (command === 'play') {
        const voiceChannel = msg.member.voiceChannel;
        if (!voiceChannel) return msg.channel.send('I\'m sorry but you need to be in a voice channel to play music!');
        const permissions = voiceChannel.permissionsFor(msg.client.user);
        if (!permissions.has('CONNECT')) {
            return msg.channel.send('I cannot connect to your voice channel, make sure I have the proper permissions!');
        }
        if (!permissions.has('SPEAK')) {
            return msg.channel.send('I cannot speak in this voice channel, make sure I have the proper permissions!');
        }

        if (url.match(/^https?:\/\/(www.youtube.com|youtube.com)\/playlist(.*)$/)) {
            const playlist = await youtube.getPlaylist(url);
            const videos = await playlist.getVideos();
            for (const video of Object.values(videos)) {
                const video2 = await youtube.getVideoByID(video.id); // eslint-disable-line no-await-in-loop
                await handleVideo(video2, msg, voiceChannel, true); // eslint-disable-line no-await-in-loop
            }
            return msg.channel.send('✅ Playlist: **${playlist.title}** has been added to the queue!');
        } else {
            try {
                var video = await youtube.getVideo(url);
            } catch (error) {
                try {
                    var videos = await youtube.searchVideos(searchString, 10);
                    let index = 0;
                    msg.channel.send('
__**Song selection:**__
${videos.map(video2 => '**${++index} -** ${video2.title}').join('\n')}
Please provide a value to select one of the search results ranging from 1-10.
                    ');
                    // eslint-disable-next-line max-depth
                    try {
                        var response = await msg.channel.awaitMessages(msg2 => msg2.content > 0 && msg2.content < 11, {
                            maxMatches: 1,
                            time: 10000,
                            errors: ['time']
                        });
                    } catch (err) {
                        console.error(err);
                        return msg.channel.send('No or invalid value entered, cancelling video selection.');
                    }
                    const videoIndex = parseInt(response.first().content);
                    var video = await youtube.getVideoByID(videos[videoIndex - 1].id);
                } catch (err) {
                    console.error(err);
                    return msg.channel.send('