Fatal error: Uncaught Error: Class 'Symfony\Component\HttpFoundation\Session\Storage\Handler\AbstractSessionHandler' not found in /var/www/typo3/vendor/symfony/http-foundation/Session/Storage/Handler/MongoDbSessionHandler.php:22
Stack trace:
#0 {main}
thrown in /var/www/typo3/vendor/symfony/http-foundation/Session/Storage/Handler/MongoDbSessionHandler.php on line 22