Fatal error: Uncaught Error: Interface 'Contao\CoreBundle\HttpKernel\Header\HeaderStorageInterface' not found in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/HttpKernel/Header/MemoryHeaderStorage.php:18 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/vendor/contao/core-bundle/src/HttpKernel/Header/MemoryHeaderStorage.php on line 18