Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/installer 5.3.0-beta1 -> satisfiable by silverstripe/installer[5.3.0-beta1]. - silverstripe/installer 5.3.0-beta1 requires silverstripe/recipe-cms ~5.3.0@beta -> satisfiable by silverstripe/recipe-cms[5.3.0-beta1, 5.3.0-rc1, 5.3.0, 5.3.x-dev]. - silverstripe/recipe-cms[5.3.0-beta1, ..., 5.3.0] require silverstripe/recipe-core ~5.3.0@stable -> satisfiable by silverstripe/recipe-core[5.3.0-beta1, 5.3.0-rc1, 5.3.0, 5.3.x-dev]. - silverstripe/recipe-cms 5.3.x-dev requires silverstripe/recipe-core 5.3.x-dev -> satisfiable by silverstripe/recipe-core[5.3.x-dev]. - silverstripe/recipe-core[5.3.0-beta1, ..., 5.3.0] require silverstripe/framework ~5.3.0@stable -> found silverstripe/framework[5.3.0-beta1, ..., 5.3.x-dev] but it conflicts with your root composer.json require (^5.4). - silverstripe/recipe-core 5.3.x-dev requires silverstripe/framework 5.3.x-dev -> found silverstripe/framework[5.3.x-dev] but it conflicts with your root composer.json require (^5.4).