Your requirements could not be resolved to an installable set of packages. Problem 1 - phpunit/php-code-coverage[10.0.0, ..., 10.1.10] require php >=8.1 -> your php version (7.4; overridden via config.platform, actual: 8.0.30) does not satisfy that requirement. - Root composer.json requires phpunit/php-code-coverage ^10.0 -> satisfiable by phpunit/php-code-coverage[10.0.0, ..., 10.1.10]. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.