( ! ) Fatal error: Class 'Symfony\Component\Serializer\Normalizer\AbstractObjectNormalizer' not found in /var/www/clients/client0/web4/web/vendor/symfony/serializer/Normalizer/ObjectNormalizer.php on line 26
Call Stack
#	Time	Memory	Function	Location
1	0.0000	360896	{main}( )	.../ObjectNormalizer.php:0