Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pagarme/pagarme-magento2-module dev-release-2.6.1 -> satisfiable by pagarme/pagarme-magento2-module[dev-release-2.6.1]. - pagarme/pagarme-magento2-module dev-release-2.6.1 requires pagarme/ecommerce-module-core ~2.6.1 -> found pagarme/ecommerce-module-core[dev-wip/kyc, dev-master, dev-release/2.6.1-rc, dev-PAOPN-721/feat-add-ticket-brand, dev-develop, dev-add-kyc-status-refused, 1.0.0, ..., 1.2.0, 2.0.1, ..., 2.6.0] but it does not match the constraint.