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 (alias of dev-master)]. - Root composer.json requires nunomaduro/larastan ^2.3.4 -> satisfiable by nunomaduro/larastan[2.3.4, ..., 2.x-dev]. - Root composer.json requires orchestra/testbench 10.* -> satisfiable by orchestra/testbench[10.0.x-dev, 10.x-dev]. - illuminate/console[v10.0.0, ..., 10.x-dev] require symfony/process ^6.2 -> satisfiable by symfony/process[v6.2.0-BETA1, ..., 6.4.x-dev]. - illuminate/console[v11.0.0, ..., 11.x-dev] require illuminate/contracts ^11.0 -> satisfiable by illuminate/contracts[v11.0.0, ..., 11.x-dev]. - illuminate/console[v9.35.0, ..., 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/console ^9.47.0 || ^10.0.0 -> satisfiable by illuminate/console[v9.47.0, ..., 9.x-dev, v10.0.0, ..., 10.x-dev]. - nunomaduro/larastan[v2.6.5, ..., v2.7.0] require illuminate/console ^9.52.16 || ^10.28.0 -> satisfiable by illuminate/console[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev]. - nunomaduro/larastan[v2.9.9, ..., 2.x-dev] require illuminate/console ^9.52.16 || ^10.28.0 || ^11.16 -> satisfiable by illuminate/console[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/console ^9.52.16 || ^10.28.0 || ^11.0 -> satisfiable by illuminate/console[v9.52.16, 9.x-dev, v10.28.0, ..., 10.x-dev, v11.0.0, ..., 11.x-dev]. - orchestra/testbench[10.0.x-dev, ..., 10.x-dev] require symfony/process ^7.2 -> satisfiable by symfony/process[v7.2.0-BETA1, ..., 7.3.x-dev]. - Conclusion: don't install illuminate/contracts v11.43.0 (conflict analysis result) - You can only install one version of a package, so only one of these can be installed: symfony/process[v4.3.4, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev, v7.0.0-BETA1, ..., 7.3.x-dev].