Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Page\Event\AbstractBeforeAssetRenderingEvent" not found in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Page/Event/BeforeStylesheetsRenderingEvent.php:25 Stack trace: #0 {main} thrown in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Page/Event/BeforeStylesheetsRenderingEvent.php on line 25