Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/typo3/class-alias-loader/src/Plugin.php:22 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/typo3/class-alias-loader/src/Plugin.php on line 22