Fatal error: Uncaught Error: Class "Symfony\Component\Config\Definition\Builder\ScalarNodeDefinition" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\config\Definition\Builder\BooleanNodeDefinition.php:22 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\config\Definition\Builder\BooleanNodeDefinition.php on line 22