Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - vimeo/psalm is locked to version 5.26.1 and an update of this package was not requested. - vimeo/psalm 5.26.1 requires php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.3) does not satisfy that requirement.