Warning: require(/var/www/html/vendor/composer/../magento/module-checkout/registration.php): Failed to open stream: No such file or directory in /var/www/html/vendor/composer/autoload_real.php on line 78

Fatal error: Uncaught Error: Failed opening required '/var/www/html/vendor/composer/../magento/module-checkout/registration.php' (include_path='.:/usr/share/php') in /var/www/html/vendor/composer/autoload_real.php:78 Stack trace: #0 /var/www/html/vendor/composer/autoload_real.php(61): composerRequirea4ea299c5978da3c1ae0a3cb614507d3() #1 /var/www/html/vendor/autoload.php(7): ComposerAutoloaderInita4ea299c5978da3c1ae0a3cb614507d3::getLoader() #2 /var/www/html/app/autoload.php(51): include('...') #3 /var/www/html/app/bootstrap.php(44): require_once('...') #4 /var/www/html/pub/index.php(12): require('...') #5 {main} thrown in /var/www/html/vendor/composer/autoload_real.php on line 78