Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires nucleos/user-bundle ^3.7 || ^4.0 -> satisfiable by nucleos/user-bundle[3.7.0, 4.0.0]. - nucleos/user-bundle[3.7.0, 4.0.0] require symfony/config ^6.4 || ^7.0 -> found symfony/config[v6.4.0, ..., v6.4.34, v7.0.0, ..., v7.4.6] but it conflicts with your root composer.json require (^8.0).