Your requirements could not be resolved to an installable set of packages. Problem 1 - drupal/acquia_cms_headless[dev-1.3.x, 1.3.0-beta1, ..., 1.3.x-dev] require drupal/core ^9 -> found drupal/core[9.0.0-alpha1, ..., 9.5.x-dev] but it conflicts with your root composer.json require (11.0.1). - drupal/acquia_cms_headless[1.3.2, ..., 1.3.5] require drupal/core ^9 || ^10 -> found drupal/core[9.0.0-alpha1, ..., 9.5.x-dev, 10.0.0-alpha1, ..., 10.4.x-dev] but it conflicts with your root composer.json require (11.0.1). - drupal/acquia_cms_headless[dev-1.x, 1.3.6, ..., 1.x-dev] require drupal/core ^9.4 || ^10 -> found drupal/core[9.4.0-alpha1, ..., 9.5.x-dev, 10.0.0-alpha1, ..., 10.4.x-dev] but it conflicts with your root composer.json require (11.0.1). - Root composer.json requires drupal/acquia_cms_headless * -> satisfiable by drupal/acquia_cms_headless[dev-1.x, dev-1.3.x, 1.3.0-beta1, ..., 1.x-dev].