Your requirements could not be resolved to an installable set of packages. Problem 1 - silverstripe/recipe-cms 4.13.x-dev requires silverstripe/cms 4.13.x-dev -> satisfiable by silverstripe/cms[4.13.x-dev] from composer repo (https://repo.packagist.org) but silverstripe/cms is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance. - silverstripe/installer 4.13.x-dev requires silverstripe/recipe-cms 4.13.x-dev -> satisfiable by silverstripe/recipe-cms[4.13.x-dev]. - Root composer.json requires silverstripe/installer 4.13.x-dev -> satisfiable by silverstripe/installer[4.13.x-dev].

Your requirements could not be resolved to an installable set of packages. Problem 1 - silverstripe/recipe-cms 4.12.x-dev requires silverstripe/admin 1.12.x-dev -> found silverstripe/admin[1.12.x-dev] but it conflicts with your root composer.json require (^1.13.20). - silverstripe/installer 4.12.x-dev requires silverstripe/recipe-cms 4.12.x-dev -> satisfiable by silverstripe/recipe-cms[4.12.x-dev]. - Root composer.json requires silverstripe/installer 4.12.x-dev -> satisfiable by silverstripe/installer[4.12.x-dev].

Your requirements could not be resolved to an installable set of packages. Problem 1 - silverstripe/recipe-cms 4.11.x-dev requires silverstripe/admin 1.11.x-dev -> found silverstripe/admin[1.11.x-dev] but it conflicts with your root composer.json require (^1.13.20). - silverstripe/installer 4.11.x-dev requires silverstripe/recipe-cms 4.11.x-dev -> satisfiable by silverstripe/recipe-cms[4.11.x-dev]. - Root composer.json requires silverstripe/installer 4.11.x-dev -> satisfiable by silverstripe/installer[4.11.x-dev].

Process completed with exit code 2.