three.js - Colors won't appear when I'm trying to load an object

Question

I'm having a problem with loading objects in three.js. As I said, colors won't appear and the object is black and white!

Here is my code:

Getting Started (I'm not really sure if this section works fine, so I put it here.)

const
    width = window.innerWidth - 300,
    height = window.innerHeight,
    scene = new THREE.Scene(),
    camera = new THREE.PerspectiveCamera(90, width / height, 1, 1000),
    renderer = new THREE.WebGLRenderer(),
    controls = new THREE.OrbitControls(camera, renderer.domElement),
    light = new THREE.AmbientLight(0xffffff, .5),
    loader = new THREE.OBJLoader();

camera.position.z = 50;
scene.add(camera);

controls.update();

scene.add(light);

renderer.setSize(width, height);
document.body.appendChild(renderer.domElement);

function animate() {
    requestAnimationFrame(animate);
    controls.update();
    renderer.render(scene, camera);
}

animate();

$(window).resize(function () {
    camera.aspect = width / height;
    camera.updateProjectionMatrix();
    renderer.setSize(width, height);
});

Loading The Object

function onProgress(xhr) {
    if (xhr.lengthComputable) {
        const percentComplete = xhr.loaded / xhr.total * 100;
        console.log(Math.round(percentComplete, 2) + '% downloaded');
    }
}

function onError() {
}

const manager = new THREE.LoadingManager();
manager.addHandler(/\.dds$/i, new THREE.DDSLoader());

new THREE.MTLLoader(manager)

    .setPath('http://localhost/X/assets/models/house/')
    .load('CH_building1.mtl', function (materials) {

        materials.preload();
        new THREE.OBJLoader(manager)
            .setMaterials(materials)

            .setPath('http://localhost/X/assets/models/house/')
            .load('CH_building1.obj', function (object) {

                object.position.y = -10;

                scene.add(object);
            }, onProgress, onError);
    });

Sorry if it's too long.

Maybe the object file is broken. And if so, then how can I fix it?

Edit: Is that because of the lights reflection?