Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symplify/easy-coding-standard ^12.0.10 -> satisfiable by symplify/easy-coding-standard[12.0.10, 12.10.0]. - symplify/easy-coding-standard[12.0.10, ..., 12.10.0] require symplify/coding-standard ^12.0.4 -> satisfiable by symplify/coding-standard[12.0.4] from composer repo (https://repo.packagist.org) but symplify/coding-standard is the root package and cannot be modified. See https://getcomposer.org/dep-on-root for details and assistance.