TypeError: Cannot read properties of undefined (reading 'id')

[MatLudke]

i copied the code from the repository and i cant run it, have installed all the dependencies
`// Create your bot
const mineflayer = require("mineflayer")
const bot = mineflayer.createBot({
host: 'fakeafusername.aternos.me',
username: 'Player',
version: '1.8.9'
})
let mcData

// Load collect block
bot.loadPlugin(require('mineflayer-collectblock').plugin)

async function collectGrass() {
// Find a nearby grass block
const grass = bot.findBlock({
matching: mcData.blocksByName.grass_block.id,
maxDistance: 64
})

if (grass) {
// If we found one, collect it.
try {
await bot.collectBlock.collect(grass)
collectGrass() // Collect another grass block
} catch (err) {
console.log(err) // Handle errors, if any
}
}
}

// On spawn, start collecting all nearby grass
bot.once('spawn', () => {
mcData = require('minecraft-data')(bot.version)
collectGrass()
})`

it gives this eror:
matching: mcData.blocksByName.grass_block.id,
^
TypeError: Cannot read properties of undefined (reading 'id')