Fatal error: Uncaught Error: Class "TYPO3\CMS\Install\FolderStructure\AbstractNode" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-install/Classes/FolderStructure/LinkNode.php:26 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-install/Classes/FolderStructure/LinkNode.php on line 26