Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in C:\Apache24\htdocs\test-project-sym\vendor\symfony\framework-bundle\DependencyInjection\FrameworkExtension.php:224 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\test-project-sym\vendor\symfony\framework-bundle\DependencyInjection\FrameworkExtension.php on line 224