Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires vimeo/psalm ^6.0.0 -> satisfiable by vimeo/psalm[6.0.0, ..., 6.5.0]. - vimeo/psalm[6.0.0, ..., 6.5.0] require php ~8.1.17 || ~8.2.4 || ~8.3.0 || ~8.4.0 -> your php version (8.1; overridden via config.platform, actual: 8.2.27) 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.