Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires interaction-design-foundation/coding-standard ^1.0-RC1 -> satisfiable by interaction-design-foundation/coding-standard[1.0.0-RC1]. - interaction-design-foundation/coding-standard 1.0.0-RC1 requires php ^8.4 -> your php version (8.3.32) does not satisfy that requirement.