Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/phpunit[10.1.1, ..., 10.3.2] require phpunit/php-code-coverage ^10.1.1 -> satisfiable by phpunit/php-code-coverage[10.1.1, 10.1.2, 10.1.3]. - phpunit/phpunit 10.1.0 requires phpunit/php-code-coverage ^10.1 -> satisfiable by phpunit/php-code-coverage[10.1.0, 10.1.1, 10.1.2, 10.1.3]. - phpunit/phpunit[10.0.0, ..., 10.0.19] require phpunit/php-code-coverage ^10.0 -> satisfiable by phpunit/php-code-coverage[10.0.0, ..., 10.1.3]. - phpunit/php-code-coverage[10.0.0, ..., 10.1.3] require sebastian/complexity ^3.0 -> satisfiable by sebastian/complexity[dev-main, 3.0.0, 3.0.x-dev (alias of dev-main)] from composer repo (https://repo.packagist.org) but sebastian/complexity is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance. - Root composer.json requires phpunit/phpunit ^10.0 -> satisfiable by phpunit/phpunit[10.0.0, ..., 10.3.2].