Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-mime ^2.11.0 -> satisfiable by laminas/laminas-mime[2.11.0]. - laminas/laminas-mime 2.11.0 requires php ~8.0.0 || ~8.1.0 || ~8.2.0 -> your php version (8.3.0RC3) does not satisfy that requirement. Problem 2 - Root composer.json requires laminas/laminas-db ^2.18 -> satisfiable by laminas/laminas-db[2.18.0]. - laminas/laminas-db 2.18.0 requires php ~8.0.0 || ~8.1.0|| ~8.2.0 -> your php version (8.3.0RC3) does not satisfy that requirement.