Unknown bootstrapping component ID: languagepicker

Hello everyone,

i’ve recentelly installed this extension (using composer) : yii2-language-picker

As the tutorial said i’ve configured my web.php configuration file as follows:


'language' => 'it',

    'sourceLanguage' => 'en-US',

    'bootstrap' => ['log','languagepicker'],

    'components' => [

    'languagepicker' => [

            'class' => 'lajax\languagepicker\Component',

            'languages' => ['it','en-US'],         

            'cookieName' => 'language',                         

            'expireDays' => 64,                                 

            'callback' => function() {

                if (!\Yii::$app->user->isGuest) {

                    $user = \Yii::$app->user->identity;

                    $user->language = \Yii::$app->language;

                    $user->save();

                }

            }

        ]

    ],

and added the language picker to the navbar:


<div class="navbar-text pull-right">

    <?=

    \lajax\languagepicker\widgets\LanguagePicker::widget([

        'skin' => \lajax\languagepicker\widgets\LanguagePicker::SKIN_DROPDOWN,

        'size' => \lajax\languagepicker\widgets\LanguagePicker::SIZE_LARGE

    ]);

    ?>

</div>

when i’m trying to run the application i recive this error :

Can someone help me with this? Thanks in advance