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, 1.0.0-RC2, 1.0.0]. - interaction-design-foundation/coding-standard[1.0.0-RC1, ..., 1.0.0] require php ^8.4 -> your php version (8.3.33) does not satisfy that requirement.