Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /home/eberhardschwarze/public_html/vendor/lexik/maintenance-bundle/DependencyInjection/LexikMaintenanceExtension.php:19 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/lexik/maintenance-bundle/DependencyInjection/LexikMaintenanceExtension.php on line 19