Fatal error: Uncaught Error: Interface "Symfony\Component\CssSelector\Parser\Handler\HandlerInterface" not found in /users/danielstruebig/www/firma/vendor/symfony/css-selector/Parser/Handler/IdentifierHandler.php:30 Stack trace: #0 {main} thrown in /users/danielstruebig/www/firma/vendor/symfony/css-selector/Parser/Handler/IdentifierHandler.php on line 30