Getting webpack error when trying to execute the command npm run build

I am following a course to create a TS/JS-based game through webpack and Phaser. My GameScene Code is:

import { Map } from "../components/map";

import TilesGroup from "../components/tiles/tilesGroup";
import Player from "../components/player/player";

export default class MainScene extends Phaser.Scene{
  player: Player
  tileGroup: TilesGroup
  cursors: Phaser.Input.Keyboard.CursorKeys
  level: number
  constructor(){
    super({
      key: "MainScene"
    })
    
  }
  init(props: {level? : number}){
    const {level = 0} = props
    this.level= Map.calcCurrentLevel(level)

  }

  create(){
    const map= new Map(this.level)
    this.cameras.main.setBackgroundColor('#ade6ff')
    this.cameras.main.fadeIn()

    this.cameras.main.setBounds(map.size.x, map.size.y, map.size.width, map.size.height)
    this.physics.world.setBounds(map.size.x, map.size.y, map.size.width, map.size.height)
    this.input.addPointer(1)
    this.cursors = this.input.keyboard.createCursorKeys()


    this.tileGroup= new TilesGroup(this,map.info.filter((el: TilesConfig) => el.type==="tile"))
    this.player= new Player(this,map.info.filter((el: TilesConfig) => el.type==="player")[0], map.size, this.level) 
  
    this.cameras.main.startFollow(this.player) …