Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\ConfigurableExtension' not found in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/DependencyInjection/ContaoCoreExtension.php:25 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/DependencyInjection/ContaoCoreExtension.php on line 25