Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laravel/framework 10.* -> satisfiable by laravel/framework[v10.0.0, ..., 10.x-dev]. - Root composer.json requires nunomaduro/larastan ^3.0 -> satisfiable by nunomaduro/larastan[v3.0.0, 3.x-dev]. - nunomaduro/larastan[v3.0.0, ..., 3.x-dev] require illuminate/support ^11.15.0 -> satisfiable by illuminate/support[v11.15.0, ..., 11.x-dev]. - Only one of these can be installed: illuminate/support[dev-master, v6.0.0, ..., 6.x-dev, v7.0.0, ..., 7.x-dev, v8.0.0, ..., 8.x-dev, v9.0.0-beta.1, ..., 9.x-dev, v10.0.0, ..., 10.x-dev, v11.0.0, ..., 11.x-dev, 12.x-dev], laravel/framework[v10.0.0, ..., 10.x-dev]. laravel/framework replaces illuminate/support and thus cannot coexist with it.