Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/ldap ^7.2 -> satisfiable by symfony/ldap[v7.2.0]. - symfony/ldap v7.2.0 requires php >=8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 2 - Root composer.json requires symfony/security-core ^7.2 -> satisfiable by symfony/security-core[v7.2.0]. - symfony/security-core v7.2.0 requires php >=8.2 -> your php version (8.1.31) does not satisfy that requirement. Problem 3 - Root composer.json requires simplesamlphp/simplesamlphp-module-ldap ^2.2 -> satisfiable by simplesamlphp/simplesamlphp-module-ldap[v2.2.0, ..., v2.4.3]. - simplesamlphp/simplesamlphp-module-ldap[v2.2.0, ..., v2.3.7] require symfony/ldap ^6.0 -> found symfony/ldap[v6.0.0, ..., v6.4.13] but it conflicts with your root composer.json require (^7.2). - simplesamlphp/simplesamlphp-module-ldap[v2.4.0, ..., v2.4.3] require symfony/ldap ^6.4 || ^7 -> satisfiable by symfony/ldap[v7.2.0]. - symfony/ldap v7.2.0 requires php >=8.2 -> your php version (8.1.31) does not satisfy that requirement.