Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Compiler\MergeExtensionConfigurationPass" not found in /home/steele15/public_html/voice/concrete/vendor/symfony/http-kernel/DependencyInjection/MergeExtensionConfigurationPass.php:22 Stack trace: #0 {main} thrown in /home/steele15/public_html/voice/concrete/vendor/symfony/http-kernel/DependencyInjection/MergeExtensionConfigurationPass.php on line 22