Fatal error: Uncaught Error: Class 'Symfony\Component\Config\Util\Exception\XmlParsingException' not found in /var/www/typo3/vendor/symfony/config/Util/Exception/InvalidXmlException.php:20 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/symfony/config/Util/Exception/InvalidXmlException.php on line 20