Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/phpcov[9.0.0, ..., 9.0.2] require php >=8.1 -> your php version (8.0.30) does not satisfy that requirement. - Root composer.json requires phpunit/phpcov ^9.0 -> satisfiable by phpunit/phpcov[9.0.0, 9.0.1, 9.0.2].