Your requirements could not be resolved to an installable set of packages. Problem 1 - symfony/var-dumper[v6.3.0, ..., v6.4.0] require php >=8.1 -> your php version (8.0.30) does not satisfy that requirement. - Root composer.json requires symfony/var-dumper ^6.3 -> satisfiable by symfony/var-dumper[v6.3.0, ..., v6.4.0].