Warning: require_once(autoload.php): Failed to open stream: No such file or directory in /opt/drupal/web/index.php on line 14

Fatal error: Uncaught Error: Failed opening required 'autoload.php' (include_path='.:/usr/local/lib/php') in /opt/drupal/web/index.php:14 Stack trace: #0 {main} thrown in /opt/drupal/web/index.php on line 14