Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/cms ^5 -> satisfiable by silverstripe/cms[5.0.0-alpha1, ..., 5.x-dev]. - silverstripe/cms[5.0.0-alpha1, ..., 5.1.4] require silverstripe/admin ^2 -> found silverstripe/admin[2.0.0-alpha1, ..., 2.x-dev] but it conflicts with your root composer.json require (^3). - silverstripe/cms[5.1.5, ..., 5.1.x-dev] require silverstripe/admin ^2.1.11 -> found silverstripe/admin[2.1.11, ..., 2.x-dev] but it conflicts with your root composer.json require (^3). - silverstripe/cms[5.2.0-beta1, ..., 5.3.x-dev] require silverstripe/admin ^2.2 -> found silverstripe/admin[2.2.0-beta1, ..., 2.x-dev] but it conflicts with your root composer.json require (^3). - silverstripe/cms 5.x-dev requires silverstripe/reports ^5 -> satisfiable by silverstripe/reports[5.0.0-alpha1, ..., 5.x-dev] from composer repo (https://repo.packagist.org) but silverstripe/reports 6.x-dev is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.