Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ^8.1 but your php version (8.0; overridden via config.platform, actual: 8.0.30) does not satisfy that requirement. Problem 2 - Root composer.json requires silverstripe/installer 5.0.x-dev -> satisfiable by silverstripe/installer[5.0.x-dev]. - silverstripe/installer 5.0.x-dev requires php ^8.1 -> your php version (8.0; overridden via config.platform, actual: 8.0.30) does not satisfy that requirement. Problem 3 - silverstripe/framework[5.0.17, ..., 5.x-dev] require php ^8.1 -> your php version (8.0; overridden via config.platform, actual: 8.0.30) does not satisfy that requirement. - Root composer.json requires silverstripe/framework ^5.0.17 -> satisfiable by silverstripe/framework[5.0.17, ..., 5.x-dev].