Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /home/tusaisqu/new/vendor_old/getkirby/composer-installer/src/ComposerInstaller/Plugin.php:16 Stack trace: #0 {main} thrown in /home/tusaisqu/new/vendor_old/getkirby/composer-installer/src/ComposerInstaller/Plugin.php on line 16