Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/console ^8.0@RC -> satisfiable by symfony/console[v8.0.0-RC1, v8.0.0-RC2, v8.0.0-RC3]. - symfony/console[v8.0.0-RC1, ..., v8.0.0-RC3] require php >=8.4 -> your php version (8.2.29) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/event-dispatcher ^8.0@RC -> satisfiable by symfony/event-dispatcher[v8.0.0-RC1]. - symfony/event-dispatcher v8.0.0-RC1 requires php >=8.4 -> your php version (8.2.29) does not satisfy that requirement. Problem 3 - Root composer.json requires symfony/finder ^8.0@RC -> satisfiable by symfony/finder[v8.0.0-RC1]. - symfony/finder v8.0.0-RC1 requires php >=8.4 -> your php version (8.2.29) does not satisfy that requirement. Problem 4 - Root composer.json requires symfony/var-dumper ^8.0@RC -> satisfiable by symfony/var-dumper[v8.0.0-RC1]. - symfony/var-dumper v8.0.0-RC1 requires php >=8.4 -> your php version (8.2.29) does not satisfy that requirement. Problem 5 - friendsofphp/php-cs-fixer v3.90.0 requires symfony/console ^5.4.47 || ^6.4.24 || ^7.0 || ^8.0 -> satisfiable by symfony/console[v8.0.0-RC1, v8.0.0-RC2, v8.0.0-RC3]. - friendsofphp/php-cs-fixer v3.75.0 requires symfony/console ^5.4 || ^6.4 || ^7.0 -> found symfony/console[v5.4.0-RC1, ..., v5.4.47, v6.4.0-RC1, ..., v6.4.27, v7.0.0-RC1, ..., v7.4.0-RC3] but it conflicts with your root composer.json require (^8.0@RC). - friendsofphp/php-cs-fixer[v3.76.0, ..., v3.85.0] require symfony/console ^5.4.45 || ^6.4.13 || ^7.0 -> found symfony/console[v5.4.45, v5.4.46, v5.4.47, v6.4.13, ..., v6.4.27, v7.0.0-RC1, ..., v7.4.0-RC3] but it conflicts with your root composer.json require (^8.0@RC). - friendsofphp/php-cs-fixer[v3.85.1, ..., v3.86.0] require symfony/console ^5.4.47 || ^6.4.13 || ^7.0 -> found symfony/console[v5.4.47, v6.4.13, ..., v6.4.27, v7.0.0-RC1, ..., v7.4.0-RC3] but it conflicts with your root composer.json require (^8.0@RC). - friendsofphp/php-cs-fixer[v3.87.0, ..., v3.89.2] require symfony/console ^5.4.47 || ^6.4.24 || ^7.0 -> found symfony/console[v5.4.47, v6.4.24, v6.4.25, v6.4.26, v6.4.27, v7.0.0-RC1, ..., v7.4.0-RC3] but it conflicts with your root composer.json require (^8.0@RC). - symfony/console[v8.0.0-RC1, ..., v8.0.0-RC3] require php >=8.4 -> your php version (8.2.29) does not satisfy that requirement. - Root composer.json requires friendsofphp/php-cs-fixer ^3.75 -> satisfiable by friendsofphp/php-cs-fixer[v3.75.0, ..., v3.90.0].