Fatal error: Uncaught Error: Interface "Symfony\Component\HttpKernel\CacheClearer\CacheClearerInterface" not found in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao/core-bundle/src/Cache/ContaoCacheClearer.php:21 Stack trace: #0 {main} thrown in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao/core-bundle/src/Cache/ContaoCacheClearer.php on line 21