Yii2 does not see widgets from kartik, how to fix it?

Question

Yii

Hello! Something happened to the composer, but the problem is that yii2 does not see the widgets from the card. The server is on ubuntu. All the time an error class Select2 not found ..... tell me please

{
    "name": "yiisoft/yii2-app-advanced",
    "description": "Yii 2 Advanced Project Template",
    "keywords": [
        "yii2",
        "framework",
        "advanced",
        "project template"
    ],
    "homepage": "http://www.yiiframework.com/",
    "type": "project",
    "license": "BSD-3-Clause",
    "support": {
        "issues": "https://github.com/yiisoft/yii2/issues?state=open",
        "forum": "http://www.yiiframework.com/forum/",
        "wiki": "http://www.yiiframework.com/wiki/",
        "irc": "irc://irc.freenode.net/yii",
        "source": "https://github.com/yiisoft/yii2"
    },
    "minimum-stability": "dev",
    "require": {
        "php": ">=5.4.0",
        "yiisoft/yii2": "~2.0.6",
        "yiisoft/yii2-bootstrap": "~2.0.0",
        "yiisoft/yii2-swiftmailer": "~2.0.0",
        "rmrevin/yii2-fontawesome": "~2.17",
        "kartik-v/yii2-export": "@dev",
        "kartik-v/yii2-widget-datepicker": "dev-master",
        "kartik-v/yii2-widget-select2": "@dev",
        "kartik-v/yii2-grid": "@dev",
        "kartik-v/yii2-tabs-x": "*",
        "loveorigami/yii2-modal-ajax": "@dev",
        "kartik-v/yii2-mpdf": "dev-master",
        "cboden/ratchet": "dev-master",
        "skeeks/yii2-mobile-detect": "dev-master",
        "kartik-v/yii2-widget-datetimepicker": "dester",
  чиь
    },
    "require-dev": {
        "yiisoft/yii2-debug": "~2.0.0",
        "yiisoft/yii2-gii": "~2.0.0",
        "yiisoft/yii2-faker": "~2.0.0",
        "codeception/base": "^2.2.3",
        "codeception/verify": "~0.3.1"
    },
    "config": {
        "process-timeout": 1800
    },
    "extra": {
        "asset-installer-paths": {
            "npm-asset-library": "vendor/npm",
            "bower-asset-library": "vendor/bower"
        }
    },
    "scripts": {
        "post-install-cmd": "php init --env=Development --overwrite=n"
    },

}

vedor yiisoft extensions:

<?php

$vendorDir = dirname(__DIR__);

return array (
  'yiisoft/yii2-swiftmailer' => 
  array (
    'name' => 'yiisoft/yii2-swiftmailer',
    'version' => '2.0.7.0',
    'alias' => 
    array (
      '@yii/swiftmailer' => $vendorDir . '/yiisoft/yii2-swiftmailer',
    ),
  ),
  'rmrevin/yii2-fontawesome' => 
  array (
    'name' => 'rmrevin/yii2-fontawesome',
    'version' => '2.9999999.9999999.9999999-dev',
    'alias' => 
    array (
      '@rmrevin/yii/fontawesome' => $vendorDir . '/rmrevin/yii2-fontawesome',
    ),
  ),
  'skeeks/yii2-mobile-detect' => 
  array (
    'name' => 'skeeks/yii2-mobile-detect',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@skeeks/yii2/mobiledetect' => $vendorDir . '/skeeks/yii2-mobile-detect',
    ),
  ),
  'kartik-v/yii2-widget-datepicker' => 
  array (
    'name' => 'kartik-v/yii2-widget-datepicker',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/date' => $vendorDir . '/kartik-v/yii2-widget-datepicker/src',
    ),
  ),
  'kartik-v/yii2-widget-datetimepicker' => 
  array (
    'name' => 'kartik-v/yii2-widget-datetimepicker',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/datetime' => $vendorDir . '/kartik-v/yii2-widget-datetimepicker/src',
    ),
  ),
  'kartik-v/yii2-sortable' => 
  array (
    'name' => 'kartik-v/yii2-sortable',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/sortable' => $vendorDir . '/kartik-v/yii2-sortable/src',
    ),
  ),
  'kartik-v/yii2-dialog' => 
  array (
    'name' => 'kartik-v/yii2-dialog',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/dialog' => $vendorDir . '/kartik-v/yii2-dialog/src',
    ),
  ),
  'kartik-v/yii2-dynagrid' => 
  array (
    'name' => 'kartik-v/yii2-dynagrid',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/dynagrid' => $vendorDir . '/kartik-v/yii2-dynagrid/src',
    ),
  ),
  'kartik-v/yii2-export' => 
  array (
    'name' => 'kartik-v/yii2-export',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/export' => $vendorDir . '/kartik-v/yii2-export/src',
    ),
  ),
  'kartik-v/yii2-grid' => 
  array (
    'name' => 'kartik-v/yii2-grid',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/grid' => $vendorDir . '/kartik-v/yii2-grid/src',
    ),
  ),
  'kartik-v/yii2-krajee-base' => 
  array (
    'name' => 'kartik-v/yii2-krajee-base',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/base' => $vendorDir . '/kartik-v/yii2-krajee-base/src',
    ),
  ),
  'kartik-v/yii2-mpdf' => 
  array (
    'name' => 'kartik-v/yii2-mpdf',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/mpdf' => $vendorDir . '/kartik-v/yii2-mpdf/src',
    ),
  ),
  'kartik-v/yii2-tabs-x' => 
  array (
    'name' => 'kartik-v/yii2-tabs-x',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/tabs' => $vendorDir . '/kartik-v/yii2-tabs-x/src',
    ),
  ),
  'kartik-v/yii2-widget-activeform' => 
  array (
    'name' => 'kartik-v/yii2-widget-activeform',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/form' => $vendorDir . '/kartik-v/yii2-widget-activeform/src',
    ),
  ),
  'kartik-v/yii2-widget-select2' => 
  array (
    'name' => 'kartik-v/yii2-widget-select2',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@kartik/select2' => $vendorDir . '/kartik-v/yii2-widget-select2/src',
    ),
  ),
  'loveorigami/yii2-modal-ajax' => 
  array (
    'name' => 'loveorigami/yii2-modal-ajax',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@lo/widgets/modal' => $vendorDir . '/loveorigami/yii2-modal-ajax/src',
    ),
  ),
  'yiisoft/yii2-bootstrap' => 
  array (
    'name' => 'yiisoft/yii2-bootstrap',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@yii/bootstrap' => $vendorDir . '/yiisoft/yii2-bootstrap/src',
    ),
  ),
  'yiisoft/yii2-debug' => 
  array (
    'name' => 'yiisoft/yii2-debug',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@yii/debug' => $vendorDir . '/yiisoft/yii2-debug/src',
    ),
  ),
  'yiisoft/yii2-faker' => 
  array (
    'name' => 'yiisoft/yii2-faker',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@yii/faker' => $vendorDir . '/yiisoft/yii2-faker/src',
    ),
  ),
  'yiisoft/yii2-gii' => 
  array (
    'name' => 'yiisoft/yii2-gii',
    'version' => '9999999-dev',
    'alias' => 
    array (
      '@yii/gii' => $vendorDir . '/yiisoft/yii2-gii/src',
    ),
  ),
);