Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pagarme/pagarme-magento2-module dev-stg -> satisfiable by pagarme/pagarme-magento2-module[dev-stg]. - pagarme/pagarme-magento2-module dev-stg requires pagarme/ecommerce-module-core 2.4.* -> found pagarme/ecommerce-module-core[dev-master, dev-update-pagarmecoreapi, dev-develop, 1.0.0, ..., 1.2.0, 2.0.1, ..., 2.3.1] but it does not match the constraint.