Your requirements could not be resolved to an installable set of packages. Problem 1 - symfony/serializer[v7.1.0-BETA1, ..., 7.2.x-dev] require php >=8.2 -> your php version (8.1.29) does not satisfy that requirement. - Root composer.json requires symfony/serializer ^7.1 -> satisfiable by symfony/serializer[v7.1.0-BETA1, ..., 7.2.x-dev].