Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires pagarme/pagarme-magento2-module dev-release/2.6.0 -> satisfiable by pagarme/pagarme-magento2-module[dev-release/2.6.0]. - pagarme/pagarme-magento2-module dev-release/2.6.0 requires pagarme/ecommerce-module-core 2.6.* -> found pagarme/ecommerce-module-core[dev-wip/kyc, dev-master, dev-release/2.6.0, dev-PAOPN-721/feat-add-ticket-brand, dev-develop, dev-add-kyc-status-refused, 1.0.0, ..., 1.2.0, 2.0.1, ..., 2.5.0] but it does not match the constraint.