Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires roadiz/core-bundle 2.8.x-dev -> satisfiable by roadiz/core-bundle[2.8.x-dev (alias of dev-develop)]. - roadiz/core-bundle dev-develop requires roadiz/documents 2.8.x-dev -> found roadiz/documents[dev-develop, 2.8.x-dev (alias of dev-develop)] but it does not match your minimum-stability. - roadiz/core-bundle 2.8.x-dev is an alias of roadiz/core-bundle dev-develop and thus requires it to be installed too.