Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires wyrihaximus/async-test-utilities ^12.1.0 -> satisfiable by wyrihaximus/async-test-utilities[12.1.0]. - wyrihaximus/async-test-utilities 12.1.0 requires php ^8.4 -> your php version (8.2.13; overridden via config.platform, actual: 8.5.4) 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.