Fatal error: Uncaught Error: Interface "Psr\Container\ContainerInterface" not found in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Settings/SettingsInterface.php:25 Stack trace: #0 {main} thrown in /home/rcmch/test.m-s-i.ch/vendor/typo3/cms-core/Classes/Settings/SettingsInterface.php on line 25