Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php ^8.3 but your php version (8.2.24) does not satisfy that requirement. Problem 2 - Root composer.json requires ibexa/core ~5.0.0@dev -> satisfiable by ibexa/core[5.0.x-dev (alias of dev-main)]. - ibexa/core dev-main requires php >=8.3 -> your php version (8.2.24) does not satisfy that requirement. - ibexa/core 5.0.x-dev is an alias of ibexa/core dev-main and thus requires it to be installed too.