Fatal error: Uncaught Error: Class "Symfony\Component\HttpFoundation\Session\Storage\Proxy\SessionHandlerProxy" not found in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/src/Ratchet/Session/Storage/Proxy/VirtualProxy.php:5 Stack trace: #0 {main} thrown in /users/energydata/www/volkszaehler.org/vendor/cboden/ratchet/src/Ratchet/Session/Storage/Proxy/VirtualProxy.php on line 5