Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires sylius/core-bundle ^1.0 -> satisfiable by sylius/core-bundle[v1.0.0, ..., v1.13.6]. - Root composer.json requires symfony/config ^5.4 || ^6.4 || ^7.0 -> satisfiable by symfony/config[v6.4.0, ..., v6.4.8]. - sylius/core-bundle[v1.0.0, ..., v1.2.16] require php ^7.1 -> your php version (8.1.30) does not satisfy that requirement. - sylius/core-bundle[v1.10.0, ..., v1.10.14] require symfony/framework-bundle ^4.4 || ^5.2 -> satisfiable by symfony/symfony[v4.4.0, ..., v4.4.51]. - sylius/core-bundle[v1.11.0, ..., v1.11.15] require symfony/framework-bundle ^4.4 || ^5.4 -> satisfiable by symfony/symfony[v4.4.0, ..., v4.4.51]. - sylius/core-bundle[v1.12.0, ..., v1.13.6] require sylius/mailer-bundle ^1.8 || ^2.0@beta -> satisfiable by sylius/mailer-bundle[v1.8.0, v1.8.1]. - sylius/core-bundle[v1.3.0, ..., v1.6.6] require php ^7.2 -> your php version (8.1.30) does not satisfy that requirement. - sylius/core-bundle[v1.7.0, ..., v1.9.10] require php ^7.3 -> your php version (8.1.30) does not satisfy that requirement. - sylius/mailer-bundle[v1.8.0, ..., v1.8.1] require symfony/config ^5.4 -> found symfony/config[v5.4.0, ..., v5.4.40] but these were not loaded, likely because it conflicts with another require. - symfony/symfony[v4.4.0, ..., v4.4.8] require php ^7.1.3 -> your php version (8.1.30) does not satisfy that requirement. - symfony/symfony[v4.4.9, ..., v4.4.10] require doctrine/persistence ^1.3 -> found doctrine/persistence[1.3.0, ..., 1.3.8] but it conflicts with your root composer.json require (^2.5 || ^3.0). - Only one of these can be installed: symfony/symfony[v3.2.0, ..., v3.4.49, v4.1.0, ..., v4.4.51], symfony/config[v6.4.0, ..., v6.4.8]. symfony/symfony replaces symfony/config and thus cannot coexist with it.