Fatal error: Uncaught Error: Class "Symfony\Component\VarDumper\Dumper\AbstractDumper" not found in D:\Application\www\Training\vendor\symfony\var-dumper\Dumper\CliDumper.php:21 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\var-dumper\Dumper\CliDumper.php on line 21