Fatal error: Uncaught Error: Class "TYPO3\CMS\Core\Package\AbstractServiceProvider" not found in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-install/Classes/ServiceProvider.php:62 Stack trace: #0 {main} thrown in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-install/Classes/ServiceProvider.php on line 62