Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in /var/www/typo3/vendor/typo3/cms-composer-installers/src/Installer/Plugin.php:34 Stack trace: #0 {main} thrown in /var/www/typo3/vendor/typo3/cms-composer-installers/src/Installer/Plugin.php on line 34