Issue setting new Yii2 theme on basic template

I have downloaded and set the theme according to the Themefactory site and other SO posts but the theme is just loading as pure html.

This is my code in the web.php file in the config directory:

<?php

    

    $params = require(__DIR__ . '/params.php');

    

    $config = [

        'id' => 'basic',

        'basePath' => dirname(__DIR__),

        'bootstrap' => ['log'],

        'components' => [

            'view' => [

               'class' => 'yii\web\View',

               'theme' => [

                  'class' => 'yii\base\dorian',

                  'pathMap' => ['@app/views' => 'themes/dorian'],

                  'baseUrl'   => 'themes/dorian'

            ],

        ],

            'request' => [

                // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation

                'cookieValidationKey' => 'KecrcGLWURmyPrWp3QBgYuOQ21JuCFA1',

            ],

            'cache' => [

                'class' => 'yii\caching\FileCache',

            ],

            'user' => [

                'identityClass' => 'app\models\User',

                'enableAutoLogin' => true,

The directory path to the new themes’s folder is: app/basic/themes/dorian

Does anyone see anything wrong???