Warning: require(app/config/bootstrap.php): Failed to open stream: No such file or directory in /var/www/html/docroot/index.php on line 9

Fatal error: Uncaught Error: Failed opening required 'app/config/bootstrap.php' (include_path='.:/usr/local/lib/php') in /var/www/html/docroot/index.php:9 Stack trace: #0 {main} thrown in /var/www/html/docroot/index.php on line 9