Where to find the absence of a class?

Question

Yii

Caught a mistake

ReflectionException
Class common\bootstrap\SetUp does not exist
/sites/test/html/vendor/yiisoft/yii2/di/Container.php

The common\bootstrap\SetUp file itself is present at the corresponding address, it is registered in the configs...
SetUp code:

namespace common\bootstrap;

use Yii;
use yii\mail\MailerInterface;
use yii\base\BootstrapInterface;
use shop\services\ContactService;
use shop\services\auth\PasswordResetService;

class SetUp implements BootstrapInterface
{
    public function bootstrap($app)
    {
        $container = Yii::$container;

        $container->setSingleton(PasswordResetService::class);

        $container->setSingleton(MailerInterface::class, function () use ($app){
            return $app->mailer;
        });

        $container->setSingleton(ContactService::class, [], [
            $app->params['adminEmail']
        ]);
    }
}

Back config:

'bootstrap' => [
        'log',
        'common\bootstrap\SetUp',
        'backend\bootstrap\SetUp',
    ],

Front config:

'bootstrap' => [
        'log',
        'common\bootstrap\SetUp',
        'frontend\bootstrap\SetUp',
    ],

Common config:

'bootstrap' => [
        'queue',
      'common\bootstrap\SetUp',
    ],

Everything seems to be in place, but something is wrong, but how to do it?

Answer 1

if you are an official participant of Eliseev's webiars, you can personally find out from him))))
Come in. To him on github and there he has classes according to the corresponding namespaces
'common\bootstrap\SetUp',
'frontend\bootstrap\SetUp

Answer 2

Turn on debug mode, you will get the full trailer