Fatal error: Default value for property of type Symfony\Component\VarDumper\Command\Descriptor\mixed may not be null. Use the nullable type ?Symfony\Component\VarDumper\Command\Descriptor\mixed to allow null default value in /home/szfwxvyz/data-a23/a23/data/old/vendor/symfony/var-dumper/Command/Descriptor/CliDescriptor.php on line 30