Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/php-code-coverage ^11.0 -> satisfiable by phpunit/php-code-coverage[11.0.0, ..., 11.0.8]. - phpunit/php-code-coverage[11.0.0, ..., 11.0.8] require php >=8.2 -> your php version (7.4; overridden via config.platform, actual: 8.3.14) does not satisfy that requirement. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.