Your lock file does not contain a compatible set of packages. Please run composer update. Problem 1 - maglnet/composer-require-checker is locked to version 4.8.0 and an update of this package was not requested. - maglnet/composer-require-checker 4.8.0 requires php ~8.2.0 || ~8.3.0 -> your php version (8.4.3) does not satisfy that requirement. Problem 2 - vimeo/psalm is locked to version 5.21.1 and an update of this package was not requested. - vimeo/psalm 5.21.1 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. Problem 3 - psalm/plugin-symfony is locked to version v5.1.0 and an update of this package was not requested. - psalm/plugin-symfony v5.1.0 requires vimeo/psalm ^5.1 -> satisfiable by vimeo/psalm[5.21.1]. - vimeo/psalm 5.21.1 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.