Error on Fresh Install

[ScottPhillips]

After a fresh install I get a fatal error when I hit the /panel url:
FatalThrowableError in Application.php line 600:
Class 'Backpack\Generators\GeneratorsServiceProvider' not found

Stack Trace is:
in Application.php line 600
at Application->resolveProviderClass('Backpack\Generators\GeneratorsServiceProvider') in Application.php line 551
at Application->register('Backpack\Generators\GeneratorsServiceProvider') in AppServiceProvider.php line 29
at AppServiceProvider->register() in Application.php line 555
at Application->register(object(AppServiceProvider)) in ProviderRepository.php line 74
at ProviderRepository->load(array('Illuminate\Auth\AuthServiceProvider', 'Illuminate\Broadcasting\BroadcastServiceProvider', 'Illuminate\Bus\BusServiceProvider', 'Illuminate\Cache\CacheServiceProvider', 'Illuminate\Foundation\Providers\ConsoleSupportServiceProvider', 'Illuminate\Cookie\CookieServiceProvider', 'Illuminate\Database\DatabaseServiceProvider', 'Illuminate\Encryption\EncryptionServiceProvider', 'Illuminate\Filesystem\FilesystemServiceProvider', 'Illuminate\Foundation\Providers\FoundationServiceProvider', 'Illuminate\Hashing\HashServiceProvider', 'Illuminate\Mail\MailServiceProvider', 'Illuminate\Pagination\PaginationServiceProvider', 'Illuminate\Pipeline\PipelineServiceProvider', 'Illuminate\Queue\QueueServiceProvider', 'Illuminate\Redis\RedisServiceProvider', 'Illuminate\Auth\Passwords\PasswordResetServiceProvider', 'Illuminate\Session\SessionServiceProvider', 'Illuminate\Translation\TranslationServiceProvider', 'Illuminate\Validation\ValidationServiceProvider', 'Illuminate\View\ViewServiceProvider', 'Illuminate\Notifications\NotificationServiceProvider', 'App\Providers\AppServiceProvider', 'App\Providers\AuthServiceProvider', 'App\Providers\EventServiceProvider', 'App\Providers\RouteServiceProvider', 'Backpack\Base\BaseServiceProvider', 'Prologue\Alerts\AlertsServiceProvider', 'Backpack\CRUD\CrudServiceProvider', 'Collective\Html\HtmlServiceProvider', 'Barryvdh\Elfinder\ElfinderServiceProvider', 'Spatie\Backup\BackupServiceProvider', 'Backpack\BackupManager\BackupManagerServiceProvider', 'Backpack\LogManager\LogManagerServiceProvider', 'Backpack\Settings\SettingsServiceProvider', 'Appzcoder\LaravelAdmin\LaravelAdminServiceProvider', 'Appzcoder\CrudGenerator\CrudGeneratorServiceProvider', 'Collective\Html\HtmlServiceProvider')) in Application.php line 530
at Application->registerConfiguredProviders() in RegisterProviders.php line 17
at RegisterProviders->bootstrap(object(Application)) in Application.php line 203
at Application->bootstrapWith(array('Illuminate\Foundation\Bootstrap\DetectEnvironment', 'Illuminate\Foundation\Bootstrap\LoadConfiguration', 'Illuminate\Foundation\Bootstrap\ConfigureLogging', 'Illuminate\Foundation\Bootstrap\HandleExceptions', 'Illuminate\Foundation\Bootstrap\RegisterFacades', 'Illuminate\Foundation\Bootstrap\RegisterProviders', 'Illuminate\Foundation\Bootstrap\BootProviders')) in Kernel.php line 253
at Kernel->bootstrap() in Kernel.php line 144
at Kernel->sendRequestThroughRouter(object(Request)) in Kernel.php line 116
at Kernel->handle(object(Request)) in index.php line 52

[AlirezaAlgo]

this is a problem with your laravel not the panel