Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-diagnostics ^1.25 -> satisfiable by laminas/laminas-diagnostics[1.25.0, 1.26.0]. - laminas/laminas-diagnostics[1.25.0, ..., 1.26.0] require php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement.