Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires phpunit/phpunit ^12.0 -> satisfiable by phpunit/phpunit[12.0.0, ..., 12.1.x-dev]. - phpunit/phpunit[12.0.0, ..., 12.1.x-dev] require sebastian/cli-parser ^4.0.0 -> found sebastian/cli-parser[dev-main, 4.0.0, 4.0.x-dev] but these were not loaded, likely because it conflicts with another require.