Fatal error: Uncaught Error: Interface 'Symfony\Component\HttpKernel\CacheWarmer\CacheWarmerInterface' not found in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/Cache/ContaoCacheWarmer.php:33 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/Cache/ContaoCacheWarmer.php on line 33