Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/installer 5.4.x-dev -> satisfiable by silverstripe/installer[5.4.x-dev]. - silverstripe/installer 5.4.x-dev requires silverstripe/recipe-cms 5.4.x-dev -> satisfiable by silverstripe/recipe-cms[5.4.x-dev]. - silverstripe/recipe-cms 5.4.x-dev requires silverstripe/recipe-core 5.4.x-dev -> satisfiable by silverstripe/recipe-core[5.4.x-dev]. - silverstripe/recipe-core 5.4.x-dev requires silverstripe/framework 5.4.x-dev -> satisfiable by silverstripe/framework[5.4.x-dev] from composer repo (https://repo.packagist.org) but silverstripe/framework 5.4.0-beta1 is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.