Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/phpunit[10.0.0, ..., 10.5.28] require php >=8.1 -> your php version (8.0.30) does not satisfy that requirement. - phpunit/phpunit[11.0.0, ..., 11.2.8] require php >=8.2 -> your php version (8.0.30) does not satisfy that requirement. - Root composer.json requires phpunit/phpunit ^10.0 || ^11.0 -> satisfiable by phpunit/phpunit[10.0.0, ..., 10.5.28, 11.0.0, ..., 11.2.8].