Merhaba laravel ile kurulmuş bir site bu hatayı veriyor nasıl düzeltebilirim önerileriniz neler olur
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1/1) FatalThrowableError
Class 'Maatwebsite\Excel\ExcelServiceProvider' not found
in Application.php line 635
at Application->resolveProvider('Maatwebsite\Excel\ExcelServiceProvider')
in Application.php line 582
at Application->register('Maatwebsite\Excel\ExcelServiceProvider')
in ProviderRepository.php line 75
at ProviderRepository->load(array('Illuminate\Broadcasting\BroadcastServiceProvider', 'Illuminate\Bus\BusServiceProvider', 'Illuminate\Cache\CacheServiceProvider', 'Illuminate\Cookie\CookieServiceProvider', 'Illuminate\Encryption\EncryptionServiceProvider', 'Illuminate\Foundation\Providers\FoundationServiceProvider', 'Illuminate\Hashing\HashServiceProvider', 'Illuminate\Pagination\PaginationServiceProvider', 'Illuminate\Pipeline\PipelineServiceProvider', 'Illuminate\Queue\QueueServiceProvider', 'Illuminate\Redis\RedisServiceProvider', 'Illuminate\Session\SessionServiceProvider', 'Illuminate\Validation\ValidationServiceProvider', 'Illuminate\View\ViewServiceProvider', 'Jenssegers\Date\DateServiceProvider', 'Laravel\Tinker\TinkerServiceProvider', 'Maatwebsite\Excel\ExcelServiceProvider', 'Carbon\Laravel\ServiceProvider', 'Laravel\Tinker\TinkerServiceProvider', 'October\Rain\Foundation\Providers\ConsoleSupportServiceProvider', 'October\Rain\Database\DatabaseServiceProvider', 'October\Rain\Halcyon\HalcyonServiceProvider', 'October\Rain\Filesystem\FilesystemServiceProvider', 'October\Rain\Parse\ParseServiceProvider', 'October\Rain\Html\HtmlServiceProvider', 'October\Rain\Html\UrlServiceProvider', 'October\Rain\Network\NetworkServiceProvider', 'October\Rain\Scaffold\ScaffoldServiceProvider', 'October\Rain\Flash\FlashServiceProvider', 'October\Rain\Mail\MailServiceProvider', 'October\Rain\Argon\ArgonServiceProvider', 'System\ServiceProvider'))
in Application.php line 561
at Application->registerConfiguredProviders()
in RegisterProviders.php line 17
at RegisterProviders->bootstrap(object(Application))
in Application.php line 85
at Application->bootstrapWith(array('\October\Rain\Foundation\Bootstrap\RegisterClassLoader', '\October\Rain\Foundation\Bootstrap\LoadEnvironmentVariables', '\October\Rain\Foundation\Bootstrap\LoadConfiguration', '\October\Rain\Foundation\Bootstrap\LoadTranslation', 'Illuminate\Foundation\Bootstrap\HandleExceptions', 'Illuminate\Foundation\Bootstrap\RegisterFacades', '\October\Rain\Foundation\Bootstrap\RegisterOctober', 'Illuminate\Foundation\Bootstrap\RegisterProviders', 'Illuminate\Foundation\Bootstrap\BootProviders'))
in Kernel.php line 162
at Kernel->bootstrap()
in Kernel.php line 146
at Kernel->sendRequestThroughRouter(object(Request))
in Kernel.php line 116
at Kernel->handle(object(Request))
in index.php line 43