Your requirements could not be resolved to an installable set of packages. Problem 1 - vimeo/psalm[5.25.0, ..., 5.x-dev] require php ^7.4 || ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. - Root composer.json requires vimeo/psalm ^5.25 -> satisfiable by vimeo/psalm[5.25.0, 5.26.0, 5.26.1, 5.x-dev].