Fatal error: Uncaught Error: Interface "Contao\CoreBundle\Config\Dumper\DumperInterface" not found in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao/core-bundle/src/Config/Dumper/CombinedFileDumper.php:22 Stack trace: #0 {main} thrown in /home/rankting/public_html/ALT/ranketing.de (contao)/vendor/contao/core-bundle/src/Config/Dumper/CombinedFileDumper.php on line 22