Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires php >=8.1 but your php version (8.0.30) does not satisfy that requirement. Problem 2 - Root composer.json requires monolog/monolog >=3.0 -> satisfiable by monolog/monolog[3.0.0-RC1, ..., 3.x-dev]. - monolog/monolog[3.0.0-RC1, ..., 3.x-dev] require php >=8.1 -> your php version (8.0.30) does not satisfy that requirement.