Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laravel/framework 12.* -> satisfiable by laravel/framework[12.x-dev]. - Root composer.json requires nunomaduro/larastan ^2.3.4 -> satisfiable by nunomaduro/larastan[2.3.4, ..., 2.x-dev]. - illuminate/support[v9.33.0, ..., 9.x-dev] require illuminate/contracts ^9.0 -> found illuminate/contracts[v9.0.0-beta.1, ..., 9.x-dev] but it conflicts with your root composer.json require (^10.0|^11.0|^12.0). - nunomaduro/larastan[2.3.4, ..., 2.3.5] require illuminate/contracts ^9 -> found illuminate/contracts[v9.0.0-beta.1, ..., 9.x-dev] but it conflicts with your root composer.json require (^10.0|^11.0|^12.0). - nunomaduro/larastan[2.4.0, ..., v2.6.4] require illuminate/support ^9.47.0 || ^10.0.0 -> satisfiable by illuminate/support[v9.47.0, ..., 9.x-dev, v10.0.0, ..., 10.x-dev]. - nunomaduro/larastan[v2.6.5, ..., v2.7.0] require illuminate/support ^9.52.16 || ^10.28.0 -> satisfiable by illuminate/support[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev]. - nunomaduro/larastan[v2.9.9, ..., 2.x-dev] require illuminate/support ^9.52.16 || ^10.28.0 || ^11.16 -> satisfiable by illuminate/support[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev, v11.16.0, ..., 11.x-dev]. - nunomaduro/larastan[v2.8.0, ..., v2.9.8] require illuminate/support ^9.52.16 || ^10.28.0 || ^11.0 -> satisfiable by illuminate/support[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev, v11.0.0, ..., 11.x-dev]. - Only one of these can be installed: illuminate/support[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[12.x-dev]. laravel/framework replaces illuminate/support and thus cannot coexist with it. - Only one of these can be installed: illuminate/support[v11.0.0, ..., 11.x-dev, 12.x-dev], laravel/framework[12.x-dev]. They all replace spatie/once and thus cannot coexist.