Autoload error

/**
* Application entry point
*
* Example - run a particular store or website:
* --------------------------------------------
* require __DIR__ . '/app/bootstrap.php';
* $params = $_SERVER;
* $params[\Magento\Store\Model\StoreManager::PARAM_RUN_CODE] = 'website2';
* $params[\Magento\Store\Model\StoreManager::PARAM_RUN_TYPE] = 'website';
* $bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $params);
* \/** @var \Magento\Framework\App\Http $app *\/
* $app = $bootstrap->createApplication(\Magento\Framework\App\Http::class);
* $bootstrap->run($app);
* --------------------------------------------
*
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/

try {
// require __DIR__ . '/app/bootstrap.php';
require __DIR__ . '/../app/bootstrap.php';

} catch (\Exception $e) {
echo <<<HTML

Autoload error

{$e->getMessage()}

HTML;
exit(1);
}

// $bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $_SERVER);

/** @var \Magento\Framework\App\Http $app */
// $app = $bootstrap->createApplication(\Magento\Framework\App\Http::class);
// $bootstrap->run($app);

$params = $_SERVER;

$params[\Magento\Store\Model\StoreManager::PARAM_RUN_CODE] = 'usa_website'; //Webite code as same in admin panel

$params[\Magento\Store\Model\StoreManager::PARAM_RUN_TYPE] = 'website';

$bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $params);

/** @var \Magento\Framework\App\Http $app */

$app = $bootstrap->createApplication('Magento\Framework\App\Http');

$bootstrap->run($app);