Fatal error: Uncaught Error: Interface 'Symfony\Component\Routing\Generator\Dumper\GeneratorDumperInterface' not found in /var/www/typo3/vendor/symfony/routing/Generator/Dumper/GeneratorDumper.php:21 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/symfony/routing/Generator/Dumper/GeneratorDumper.php on line 21