Laravel错误：未捕获ReflectionException：类App \ Http \ Kernel不存在

我不知道我用Laravel 5.3项目做了什么，但是我有这个错误：

致命错误：未捕获ReflectionException：类App \ Http \ Kernel在C：\ laragon \ www \ BookTime \ vendor \ laravel \ framework \ src \ Illuminate \ Container \ Container.php中不存在：729堆栈跟踪：＃0 C： \ laragon \ www \ BookTime \ vendor \ laravel \ framework \ src \ Illuminate \ Container \ Container.php（729）：ReflectionClass - > __ construct（'App \ Http \ Kernel'）＃1 C：\ laragon \ www \ BookTime \ vendor \ laravel \ framework \ src \ Illuminate \ Container \ Container.php（608）：Illuminate \ Container \ Container-> build（'App \ Http \ Kernel'）＃2 C：\ laragon \ www \ BookTime \ vendor \ laravel \ framework \ src \ Illuminate \ Container \ Container.php（564）：Illuminate \ Container \ Container-> resolve（'App \ Http \ Kernel'，Array）＃3 C：\ laragon \ www \ BookTime \ vendor \ laravel \ framework \ src \ Illuminate \ Foundation \ Application.php（709）：Illuminate \ Container \ Container-> makeWith（'App \ Http \ Kernel'，Array）4 C：\ laragon \ www \ BookTime \ vendor \ laravel \ framework \ src \ Illuminate \ Container \ Container.php（248）：Illuminate \ Foundation \ Application-> makeWith（'App \ Http \ Kernel'，Array）＃5 C：\ laragon \ w第729行的C：\ laragon \ www \ BookTime \ vendor \ laravel \ framework \ src \ Illuminate \ Container \ Container.php中的ww \ BookTime \ vendor \ laravel \ f

操作系统：Windows 10 Localhost：Laragon PHP版本：5.6.4

那是我的package.json

{  "name": "laravel/laravel",
  "description": "The Laravel Framework.",
  "keywords": ["framework", "laravel"],
  "license": "MIT",
  "type": "project",
  "require": {
    "php": ">=5.6.4",
    "laravel/framework": "5.3.*"
  },
  "require-dev": {
    "fzaninotto/faker": "~1.4",
    "mockery/mockery": "0.9.*",
    "phpunit/phpunit": "~5.0",
    "symfony/css-selector": "3.1.*",
    "symfony/dom-crawler": "3.1.*"
  },
  "autoload": {
    "classmap": [
      "database"
    ],
    "psr-4": {
      "App\\": "app/"
    }
  },
  "autoload-dev": {
    "classmap": [
      "tests/TestCase.php"
    ]
  },
  "scripts": {
    "post-root-package-install": [
      "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
    ],
    "post-create-project-cmd": [
      "php artisan key:generate"
    ],
    "post-install-cmd": [
      "Illuminate\\Foundation\\ComposerScripts::postInstall",
      "php artisan optimize"
    ],
    "post-update-cmd": [
      "Illuminate\\Foundation\\ComposerScripts::postUpdate",
      "php artisan optimize"
    ]
  },
  "config": {
    "preferred-install": "dist",
    "sort-packages": true
  }
}

我在app.php的提供者

[

/*
         * Laravel Framework Service Providers...
         */
        Collective\Html\HtmlServiceProvider::class,
        Barryvdh\Debugbar\ServiceProvider::class,
        Illuminate\Auth\AuthServiceProvider::class,
        Illuminate\Broadcasting\BroadcastServiceProvider::class,
        Illuminate\Bus\BusServiceProvider::class,
        Illuminate\Cache\CacheServiceProvider::class,
        Illuminate\Foundation\Providers\ConsoleSupportServiceProvider::class,
        Illuminate\Cookie\CookieServiceProvider::class,
        Illuminate\Database\DatabaseServiceProvider::class,
        Illuminate\Encryption\EncryptionServiceProvider::class,
        Illuminate\Filesystem\FilesystemServiceProvider::class,
        Illuminate\Foundation\Providers\FoundationServiceProvider::class,
        Illuminate\Hashing\HashServiceProvider::class,
        Illuminate\Mail\MailServiceProvider::class,
        Illuminate\Notifications\NotificationServiceProvider::class,
        Illuminate\Pagination\PaginationServiceProvider::class,
        Illuminate\Pipeline\PipelineServiceProvider::class,
        Illuminate\Queue\QueueServiceProvider::class,
        Illuminate\Redis\RedisServiceProvider::class,
        Illuminate\Auth\Passwords\PasswordResetServiceProvider::class,
        Illuminate\Session\SessionServiceProvider::class,
        Illuminate\Translation\TranslationServiceProvider::class,
        Illuminate\Validation\ValidationServiceProvider::class,
        Illuminate\View\ViewServiceProvider::class,

        /*
         * Package Service Providers...
         */
        Laravel\Tinker\TinkerServiceProvider::class,

        /*
         * Application Service Providers...
         */
        App\Providers\AppServiceProvider::class,
        App\Providers\AuthServiceProvider::class,
        // App\Providers\BroadcastServiceProvider::class,
        App\Providers\EventServiceProvider::class,
        App\Providers\RouteServiceProvider::class,

    ],

    /*
    |--------------------------------------------------------------------------
    | Class Aliases
    |--------------------------------------------------------------------------
    |
    | This array of class aliases will be registered when this application
    | is started. However, feel free to register as many as you wish as
    | the aliases are "lazy" loaded so they don't hinder performance.
    |
    */

    'aliases' => [
        'Form' => Collective\Html\FormFacade::class,
        'Debugbar' => Barryvdh\Debugbar\Facade::class,
        'Html' => Collective\Html\HtmlFacade::class,
        'App' => Illuminate\Support\Facades\App::class,
        'Artisan' => Illuminate\Support\Facades\Artisan::class,
        'Auth' => Illuminate\Support\Facades\Auth::class,
        'Blade' => Illuminate\Support\Facades\Blade::class,
        'Broadcast' => Illuminate\Support\Facades\Broadcast::class,
        'Bus' => Illuminate\Support\Facades\Bus::class,
        'Cache' => Illuminate\Support\Facades\Cache::class,
        'Config' => Illuminate\Support\Facades\Config::class,
        'Cookie' => Illuminate\Support\Facades\Cookie::class,
        'Crypt' => Illuminate\Support\Facades\Crypt::class,
        'DB' => Illuminate\Support\Facades\DB::class,
        'Eloquent' => Illuminate\Database\Eloquent\Model::class,
        'Event' => Illuminate\Support\Facades\Event::class,
        'File' => Illuminate\Support\Facades\File::class,
        'Gate' => Illuminate\Support\Facades\Gate::class,
        'Hash' => Illuminate\Support\Facades\Hash::class,
        'Lang' => Illuminate\Support\Facades\Lang::class,
        'Log' => Illuminate\Support\Facades\Log::class,
        'Mail' => Illuminate\Support\Facades\Mail::class,
        'Notification' => Illuminate\Support\Facades\Notification::class,
        'Password' => Illuminate\Support\Facades\Password::class,
        'Queue' => Illuminate\Support\Facades\Queue::class,
        'Redirect' => Illuminate\Support\Facades\Redirect::class,
        'Redis' => Illuminate\Support\Facades\Redis::class,
        'Request' => Illuminate\Support\Facades\Request::class,
        'Response' => Illuminate\Support\Facades\Response::class,
        'Route' => Illuminate\Support\Facades\Route::class,
        'Schema' => Illuminate\Support\Facades\Schema::class,
        'Session' => Illuminate\Support\Facades\Session::class,
        'Storage' => Illuminate\Support\Facades\Storage::class,
        'URL' => Illuminate\Support\Facades\URL::class,
        'Validator' => Illuminate\Support\Facades\Validator::class,
        'View' => Illuminate\Support\Facades\View::class,

    ],

我该如何解决这个问题？