Fatal error: Uncaught Error: Class "Symfony\Component\Serializer\Encoder\SerializerAwareEncoder" not found in /home/rogertabor/public_html/concrete/vendor/symfony/serializer/Encoder/XmlEncoder.php:25 Stack trace: #0 {main} thrown in /home/rogertabor/public_html/concrete/vendor/symfony/serializer/Encoder/XmlEncoder.php on line 25