Error: FFmpeg/avconv not found!

const { Events } = require('discord.js');

module.exports = {
    name: Events.ClientReady,
    execute(client) {
console.log(`Ready! Logged in as ${client.user.tag}`);
const { joinVoiceChannel } = require('@discordjs/voice');
let channel = client.channels.cache.get('871129812046082078')
const connection = joinVoiceChannel({
    channelId: channel.id,
    guildId: channel.guild.id,
    adapterCreator: channel.guild.voiceAdapterCreator,
});
const { createAudioPlayer, NoSubscriberBehavior, createAudioResource, StreamType } = require('@discordjs/voice');
const { join } = require('node:path');
const { createReadStream } = require('node:fs');
const player = createAudioPlayer({
    behaviors: {
        noSubscriber: NoSubscriberBehavior.Pause,
    },
});

const resource = createAudioResource(createReadStream(join('./test.webm')));

player.play(resource);
},
};

const { Events } = require('discord.js');

module.exports = {
    name: Events.ClientReady,
    execute(client) {
console.log(`Ready! Logged in as ${client.user.tag}`);
const { joinVoiceChannel } = require('@discordjs/voice');
let channel = client.channels.cache.get('871129812046082078')
const connection = joinVoiceChannel({
    channelId: channel.id,
    guildId: channel.guild.id,
    adapterCreator: channel.guild.voiceAdapterCreator,
});
const { createAudioPlayer, NoSubscriberBehavior, createAudioResource, StreamType } = require('@discordjs/voice');
const { join } = require('node:path');
const { createReadStream } = require('node:fs');
const player = createAudioPlayer({
    behaviors: {
        noSubscriber: NoSubscriberBehavior.Pause,
    },
});

const resource = createAudioResource(createReadStream(join('./test.webm')));

player.play(resource);
},
};