Fatal error: Uncaught Error: Interface 'Symfony\Component\Config\Definition\ConfigurationInterface' not found in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/DependencyInjection/Configuration.php:23
Stack trace:
#0 {main}
thrown in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/DependencyInjection/Configuration.php on line 23