Your requirements could not be resolved to an installable set of packages. Problem 1 - simplesamlphp/simplesamlphp[v2.0.0, ..., 2.0.5] require simplesamlphp/assert ^0.8.0 -> found simplesamlphp/assert[v0.8.0] but it conflicts with your root composer.json require (^1.0.0). - simplesamlphp/simplesamlphp v2.0.6 requires symfony/http-foundation ^5.4 -> found symfony/http-foundation[v5.4.0, ..., v5.4.28] but it conflicts with your root composer.json require (^6.0). - Root composer.json requires simplesamlphp/simplesamlphp ^2.0 -> satisfiable by simplesamlphp/simplesamlphp[v2.0.0, ..., v2.0.6].