Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php >=8.3 but your php version (8.2.30) does not satisfy that requirement. Problem 2 - Root composer.json requires rector/rector-src dev-main -> satisfiable by rector/rector-src[dev-main]. - rector/rector-src dev-main requires rector/rector-symfony dev-main -> satisfiable by rector/rector-symfony[dev-main]. - rector/rector-symfony dev-main requires php >=8.3 -> your php version (8.2.30) does not satisfy that requirement.