Fatal error: Uncaught Error: Class "Symfony\Flex\Configurator\AbstractConfigurator" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\flex\src\Configurator\MakefileConfigurator.php:21 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\flex\src\Configurator\MakefileConfigurator.php on line 21