Your requirements could not be resolved to an installable set of packages. Problem 1 - drupal/config_sync_without_site_uuid[1.0.0-beta1, ..., 1.0.x-dev] require drupal/core ^9 || ^10 -> found drupal/core[9.0.0-alpha1, ..., 9.5.x-dev, 10.0.0-alpha1, ..., 10.1.x-dev] but it conflicts with your root composer.json require (11.x-dev). - acquia/drupal-recommended-settings 1.0.0-alpha1 requires drupal/config_sync_without_site_uuid ^1.0 -> satisfiable by drupal/config_sync_without_site_uuid[1.0.0-beta1, 1.0.x-dev]. - Root composer.json requires acquia/drupal-recommended-settings ^1.0@alpha -> satisfiable by acquia/drupal-recommended-settings[1.0.0-alpha1].