Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php >=7.4 but your php version (7.2.34) does not satisfy that requirement. Problem 2 - Root composer.json requires league/config ^1.2 -> satisfiable by league/config[v1.2.0, 1.2.x-dev]. - league/config[v1.2.0, 1.2.x-dev] require php ^7.4 || ^8.0 -> your php version (7.2.34) does not satisfy that requirement.