Fatal error: Uncaught Error: Class 'Symfony\Component\VarDumper\Cloner\AbstractCloner' not found in /var/www/api_backup/vendor/symfony/var-dumper/Cloner/VarCloner.php:17 Stack trace: #0 {main} thrown in /var/www/api_backup/vendor/symfony/var-dumper/Cloner/VarCloner.php on line 17