Fatal error: Uncaught Error: Interface "JMS\Serializer\Annotation\SerializerAttribute" not found in /home/palabrebel/www/kimai/vendor/jms/serializer/src/Annotation/SkipWhenEmpty.php:12 Stack trace: #0 {main} thrown in /home/palabrebel/www/kimai/vendor/jms/serializer/src/Annotation/SkipWhenEmpty.php on line 12