Fatal error: Uncaught Error: Class "TYPO3\CMS\Scheduler\AbstractAdditionalFieldProvider" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-reports/Classes/Task/SystemStatusUpdateTaskNotificationEmailField.php:31 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/cms-reports/Classes/Task/SystemStatusUpdateTaskNotificationEmailField.php on line 31