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 symfony/http-foundation ^6.4.0 -> satisfiable by symfony/http-foundation[v6.4.0, ..., v6.4.10]. - symfony/http-foundation[v6.4.0, ..., v6.4.10] require php >=8.1 -> your php version (8.0.30) does not satisfy that requirement. Problem 3 - simplesamlphp/simplesamlphp[v2.2.0, ..., v2.2.2] require php ^8.1 -> your php version (8.0.30) does not satisfy that requirement. - Root composer.json requires simplesamlphp/simplesamlphp ^2.2.0 -> satisfiable by simplesamlphp/simplesamlphp[v2.2.0, v2.2.1, v2.2.2].