Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/recipe-form-building 2.4.x-dev (exact version match), found silverstripe/recipe-form-building[dev-master, 1.0.0-rc1, ..., 1.x-dev, 2.0.0-beta1, ..., 2.x-dev, 3.x-dev] but it does not match the constraint.