Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires chubbyphp/chubbyphp-dev-helper dev-master -> satisfiable by chubbyphp/chubbyphp-dev-helper[dev-master]. - chubbyphp/chubbyphp-dev-helper dev-master requires php ^8.1 -> your php version (8.0.30) does not satisfy that requirement.