Fatal error: Uncaught Error: Class "JMS\Serializer\AbstractVisitor" not found in /home8/xmeta/xmt.xmeta.ro/kimai2/vendor/jms/serializer/src/XmlSerializationVisitor.php:18 Stack trace: #0 {main} thrown in /home8/xmeta/xmt.xmeta.ro/kimai2/vendor/jms/serializer/src/XmlSerializationVisitor.php on line 18