Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^11.0.0 -> satisfiable by phpunit/phpunit[11.0.0, ..., 11.4.3]. - phpunit/phpunit[11.0.0, ..., 11.4.3] require php >=8.2 -> your php version (8.1.30) does not satisfy that requirement.