Fatal error: Uncaught Error: Interface 'Neos\Neos\Ui\NodeCreationHandler\NodeCreationHandlerInterface' not found in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.Neos.Ui/Classes/NodeCreationHandler/DocumentTitleNodeCreationHandler.php:18 Stack trace: #0 {main} thrown in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.Neos.Ui/Classes/NodeCreationHandler/DocumentTitleNodeCreationHandler.php on line 18