Are you using old Composer? Read https://discourse.hkvstore.com/t/interface-psr-http-message-requestfactoryinterface-not-found/3419/1 may update to the latest Composer (v2.0.7 as of today) and try again.
Are you using old Composer? Read https://discourse.hkvstore.com/t/interface-psr-http-message-requestfactoryinterface-not-found/3419/1 may update to the latest Composer (v2.0.7 as of today) and try again.