Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Page\JavaScriptModuleInstruction" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-t3editor/Configuration/Backend/T3editor/Addons.php:10 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-t3editor/Configuration/Backend/T3editor/Addons.php on line 10