Fatal error: Uncaught Error: Class 'Symfony\Component\Serializer\Exception\NotEncodableValueException' not found in /home/discovergreece/public_html/vendor/symfony/serializer/Exception/UnsupportedFormatException.php:17 Stack trace: #0 {main} thrown in /home/discovergreece/public_html/vendor/symfony/serializer/Exception/UnsupportedFormatException.php on line 17