Fatal error: Uncaught Error: Class "Symfony\Component\Config\Definition\Exception\InvalidConfigurationException" not found in /var/www/html/updates/concrete-cms-9.3.9-remote-updater/concrete/vendor/symfony/config/Definition/Exception/DuplicateKeyException.php:20 Stack trace: #0 {main} thrown in /var/www/html/updates/concrete-cms-9.3.9-remote-updater/concrete/vendor/symfony/config/Definition/Exception/DuplicateKeyException.php on line 20