Why it doesen't work?

[Roger]

var game = new Phaser.Game(800, 600, Phaser.AUTO, '', { preload: preload, create: create, update: update });
 function preload() {
    game.load.image('fondo', 'imgs/sky.png');
    game.load.image('plataforma', 'imgs/platform.png');
    game.load.image('diamante', 'imgs/diamond.png');
    game.load.spritesheet('personaje', 'imgs/dude.png', 32, 48);
}
 
function create() {
var plataforma;
var suelo;
var personaje;
var diamantes;
var bandeja;
 
game.add.sprite(0,0, 'fondo');
 
 plataforma = game.add.sprite(0, 100, 'plataforma');
 plataforma.width = 800;
 
 suelo = game.add.sprite(0, game.world.height - 5, 'plataforma');
 suelo.width = 800;
 suelo.height = 5;
 
 bandeja = game.add.sprite(50, game.world.height - 100, 'plataforma');
 bandeja.width = 150;
 
 personaje = game.add.sprite(32, 0, 'personaje');

}
 
function update() {
}

When I open this, a message appears at the console:

Uncaught DOMException: Failed to execute 'texImage2D' on 'WebGLRenderingContext': The cross-origin image at file:///home/roger/Escritorio/PhaserJuego/imgs/sky.png may not be loaded.
    at s.WebGLRenderer.updateTexture (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:160952)
    at s.WebGLSpriteBatch.renderBatch (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:177239)
    at s.WebGLSpriteBatch.flush (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:177030)
    at s.WebGLSpriteBatch.render (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:172219)
    at i.Sprite.s.Sprite._renderWebGL (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:134036)
    at i.World.s.DisplayObjectContainer._renderWebGL (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:130384)
    at i.Stage.s.DisplayObjectContainer._renderWebGL (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:130384)
    at s.WebGLRenderer.renderDisplayObject (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:159001)
    at s.WebGLRenderer.render (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:158569)
    at i.Game.updateRender (file:///home/roger/Escritorio/PhaserJuego/phaser.min.js:3:287450)
s.WebGLRenderer.updateTexture @ phaser.min.js:3
s.WebGLSpriteBatch.renderBatch @ phaser.min.js:3
s.WebGLSpriteBatch.flush @ phaser.min.js:3
s.WebGLSpriteBatch.render @ phaser.min.js:3
s.Sprite._renderWebGL @ phaser.min.js:3
s.DisplayObjectContainer._renderWebGL @ phaser.min.js:3
s.DisplayObjectContainer._renderWebGL @ phaser.min.js:3
s.WebGLRenderer.renderDisplayObject @ phaser.min.js:3
s.WebGLRenderer.render @ phaser.min.js:3
updateRender @ phaser.min.js:3
update @ phaser.min.js:3
updateRAF @ phaser.min.js:3
window.requestAnimationFrame.forceSetTimeOut._onLoop @ phaser.min.js:3
requestAnimationFrame (async)
updateRAF @ phaser.min.js:3
window.requestAnimationFrame.forceSetTimeOut._onLoop @ phaser.min.js:3
requestAnimationFrame (async)
updateRAF @ phaser.min.js:3
window.requestAnimationFrame.forceSetTimeOut._onLoop @ phaser.min.js:3
requestAnimationFrame (async)
start @ phaser.min.js:3
boot @ phaser.min.js:3
i.Device._readyCheck @ phaser.min.js:3

 

What does it mean?

PD:Index.html is OK, and the images too.

Thanks.

[rich]

This isn't a Phaser 3 question.

Also, the answer is right there in the error message: "The cross-origin image at file:///home/roger/Escritorio/PhaserJuego/imgs/sky.png may not be loaded." - you've tried to just open your games web page directly into your browser. It won't work. Please see the getting started guide we publish on the Phaser site.