Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires laminas/laminas-cache ^3.12.2 -> satisfiable by laminas/laminas-cache[3.12.2]. - laminas/laminas-cache 3.12.2 requires php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 2 - Root composer.json requires laminas/laminas-cache-storage-adapter-memory ^2.3.0 -> satisfiable by laminas/laminas-cache-storage-adapter-memory[2.3.0]. - laminas/laminas-cache-storage-adapter-memory 2.3.0 requires php ~8.0.0 || ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 3 - Root composer.json requires roave/infection-static-analysis-plugin ^1.35.0 -> satisfiable by roave/infection-static-analysis-plugin[1.35.0]. - roave/infection-static-analysis-plugin 1.35.0 requires php ~8.1.0 || ~8.2.0 || ~8.3.0 -> your php version (8.4.0RC1) does not satisfy that requirement. Problem 4 - Root composer.json requires vimeo/psalm ^5.26.1 -> satisfiable by vimeo/psalm[5.26.1]. - vimeo/psalm 5.26.1 requires 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. Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.