Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires drupal/core 11.0.x-dev -> satisfiable by drupal/core[11.0.x-dev]. - drupal/core 11.0.x-dev requires php >=8.3.0 -> your php version (8.1.30) does not satisfy that requirement. Problem 2 - Root composer.json requires drush/drush 13.3.3 -> satisfiable by drush/drush[13.3.3]. - drush/drush 13.3.3 requires php >=8.2 -> your php version (8.1.30) does not satisfy that requirement. Problem 3 - Root composer.json requires drupal/core-dev 11.0.x-dev -> satisfiable by drupal/core-dev[11.0.x-dev]. - drupal/core-dev 11.0.x-dev requires symfony/error-handler ^7.1 -> satisfiable by symfony/error-handler[v7.1.0-BETA1, ..., 7.2.x-dev]. - symfony/error-handler[v7.0.0-BETA1, ..., 7.2.x-dev] require php >=8.2 -> your php version (8.1.30) does not satisfy that requirement.