Fatal error: Uncaught Error: Interface 'Symfony\Component\DependencyInjection\Dumper\DumperInterface' not found in /var/www/typo3/vendor/symfony/dependency-injection/Dumper/Dumper.php:21
Stack trace:
#0 {main}
thrown in /var/www/typo3/vendor/symfony/dependency-injection/Dumper/Dumper.php on line 21