Warning: require(/opt/drupal/web/vendor/autoload.php): Failed to open stream: No such file or directory in /opt/drupal/web/autoload.php on line 16

Fatal error: Uncaught Error: Failed opening required '/opt/drupal/web/vendor/autoload.php' (include_path='.:/usr/local/lib/php') in /opt/drupal/web/autoload.php:16 Stack trace: #0 /opt/drupal/web/index.php(14): require_once() #1 {main} thrown in /opt/drupal/web/autoload.php on line 16