Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Extension\Extension' not found in G:\projects\test-ecoach-ieltsmentor\vendor\symfony\http-kernel\DependencyInjection\Extension.php:21 Stack trace: #0 {main} thrown in G:\projects\test-ecoach-ieltsmentor\vendor\symfony\http-kernel\DependencyInjection\Extension.php on line 21