Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-serializer ^3.0 -> satisfiable by laminas/laminas-serializer[3.0.0]. - laminas/laminas-serializer 3.0.0 requires laminas/laminas-servicemanager ^4.1 -> found laminas/laminas-servicemanager[4.1.0] but it conflicts with your root composer.json require (^2.7.9 || ^3.4.0).