Fatal error: Uncaught Error: Interface "Composer\Plugin\PluginInterface" not found in /home/qcsvlel/www/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/fixtures/composer-plugin-implements-scaffold-events/src/ComposerPluginImplementsScaffoldEvents.php:17 Stack trace: #0 {main} thrown in /home/qcsvlel/www/core/tests/Drupal/Tests/Composer/Plugin/Scaffold/fixtures/composer-plugin-implements-scaffold-events/src/ComposerPluginImplementsScaffoldEvents.php on line 17