Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/browser-kit ^7.1 -> satisfiable by symfony/browser-kit[v7.1.0, ..., v7.2.4]. - symfony/browser-kit[v7.1.0, ..., v7.2.4] require php >=8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/debug-bundle ^7.1 -> satisfiable by symfony/debug-bundle[v7.1.0, v7.1.1, v7.1.6, v7.2.0]. - symfony/debug-bundle[v7.1.0, ..., v7.2.0] require php >=8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 3 - Root composer.json requires symfony/dotenv ^7.1 -> satisfiable by symfony/dotenv[v7.1.0, ..., v7.2.0]. - symfony/dotenv[v7.1.0, ..., v7.2.0] require php >=8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 4 - Root composer.json requires symfony/intl ^7.1 -> satisfiable by symfony/intl[v7.1.0, ..., v7.2.0]. - symfony/intl[v7.1.0, ..., v7.2.0] require php >=8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 5 - Root composer.json requires sylius/sylius ^1.12 -> satisfiable by sylius/sylius[v1.12.0, ..., v1.14.3]. - sylius/sylius[v1.12.0, ..., v1.12.19] require symfony/intl ^5.4 || ^6.0 -> found symfony/intl[v5.4.0, ..., v5.4.47, v6.0.0, ..., v6.4.15] but it conflicts with your root composer.json require (^7.1). - sylius/sylius[v1.13.0, ..., v1.14.3] require symfony/intl ^5.4.21 || ^6.4 -> found symfony/intl[v5.4.21, ..., v5.4.47, v6.4.0, ..., v6.4.15] but it conflicts with your root composer.json require (^7.1).