Fatal error: Uncaught Error: Class 'Symfony\Component\DependencyInjection\Compiler\MergeExtensionConfigurationPass' not found in C:\xampp\htdocs\admin\vendor\symfony\http-kernel\DependencyInjection\MergeExtensionConfigurationPass.php:22 Stack trace: #0 {main} thrown in C:\xampp\htdocs\admin\vendor\symfony\http-kernel\DependencyInjection\MergeExtensionConfigurationPass.php on line 22