AdminLte problem installation

can anyone tell me, what’s this not working ?

I downloaded Admin-lte and copied to vendor/bower, then set backend/AppAsset in this way


class AppAsset extends AssetBundle

{

    public $sourcePath = '@bower/';

    public $css = ['admin-lte/dist/css/AdminLTE.css'];

    public $js = ['admin-lte/dist/js/AdminLTE/app.js'];

    public $depends = [

        'yii\web\YiiAsset',

        'yii\bootstrap\BootstrapAsset',

        'yii\bootstrap\BootstrapPluginAsset',

    ];

}

You need to install it using Composer… trust me, it is far easier.