Fatal error: Uncaught Error: Interface 'Composer\Plugin\PluginInterface' not found in C:\SistemasPHP\observatorio4\vendor\drupal\core-project-message\MessagePlugin.php:17
Stack trace:
#0 {main}
thrown in C:\SistemasPHP\observatorio4\vendor\drupal\core-project-message\MessagePlugin.php on line 17