How to create rules in dektrium rbac for Yii2?

Question

Yii

Hello. Installed dektrium/yii2-rbacand dektrium/yii2-user
backend
config:

'components' => [
        'user' => [
            'identityClass' => 'common\models\User',
            'identityCookie' => [
                'name'     => '_backendIdentity',
                'path'     => '/admin',
                'httpOnly' => true,
            ],
        ],
        'session' => [
            'name' => 'BACKENDSESSID',
            'cookieParams' => [
                'httpOnly' => true,
                'path'     => '/admin',
            ],
        ],
    'modules' => [
        'user' => [
            'as backend' => 'dektrium\user\filters\BackendFilter',
        ],
        'rbac' => [
            'class' => 'dektrium\rbac\Module',
        ],
    ],

frontend:

'user' => [
            'enableAutoLogin' => true,
            'identityClass' => 'common\models\User',
            'identityCookie' => [
                'name'     => '_frontendIdentity',
                'path'     => '/',
                'httpOnly' => true,
            ],
        ],
        'session' => [
            'name' => 'FRONTENDSESSID',
            'cookieParams' => [
                'httpOnly' => true,
                'path'     => '/',
            ],
        ],
    'modules' => [
        'user' => [
            // following line will restrict access to admin controller from frontend application
            'as frontend' => 'dektrium\user\filters\FrontendFilter',
        ],
        'rbac' => [
            'class' => 'dektrium\rbac\Module',
        ],
    ],

common

'user' => [
            'class' => 'dektrium\user\Module',
            'admins' => ['root'],
            'confirmWithin' => 21600,
            'cost' => 12,
            'enableConfirmation' => false, // @TODO remove this
        ],

I performed migrations, I create roles and permissions through the interface, I type in the Rules field, any time I try to enter an action, it says “Class "Foo" is missing”, what should I write there? Maybe the config is not valid?