Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /var/www/html/dev.hallescherfc.de/vendor/tbachert/spi/src/Composer/Plugin.php:34 Stack trace: #0 {main} thrown in /var/www/html/dev.hallescherfc.de/vendor/tbachert/spi/src/Composer/Plugin.php on line 34