Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - vimeo/psalm is locked to version 5.8.0 and an update of this package was not requested. - vimeo/psalm 5.8.0 requires php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (8.3.6) does not satisfy that requirement.