Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Loader\Configurator\AbstractServiceConfigurator' not found in C:\SistemasPHP\observatorio4\vendor\symfony\dependency-injection\Loader\Configurator\AliasConfigurator.php:19 Stack trace: #0 {main} thrown in C:\SistemasPHP\observatorio4\vendor\symfony\dependency-injection\Loader\Configurator\AliasConfigurator.php on line 19