Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/console ^8.0 -> satisfiable by symfony/console[v8.0.0, ..., v8.0.8]. - symfony/console[v8.0.0, ..., v8.0.8] require php >=8.4 -> your php version (8.3.30) does not satisfy that requirement. Problem 2 - Root composer.json requires friendsofphp/php-cs-fixer ^3.95 -> satisfiable by friendsofphp/php-cs-fixer[v3.95.0, v3.95.1]. - friendsofphp/php-cs-fixer[v3.95.0, ..., v3.95.1] require symfony/console ^5.4.47 || ^6.4.24 || ^7.0 || ^8.0 -> satisfiable by symfony/console[v8.0.0, ..., v8.0.8]. - symfony/console[v8.0.0, ..., v8.0.8] require php >=8.4 -> your php version (8.3.30) does not satisfy that requirement.