Fatal error: Uncaught Error: Class 'Symfony\Component\HttpFoundation\Session\Storage\Proxy\AbstractProxy' not found in /var/www/typo3/vendor/symfony/http-foundation/Session/Storage/Proxy/SessionHandlerProxy.php:19 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/symfony/http-foundation/Session/Storage/Proxy/SessionHandlerProxy.php on line 19