Your requirements could not be resolved to an installable set of packages. Problem 1 - matthiasnoback/symfony-dependency-injection-test[4.1.0, ..., 4.2.0] require php ^7.2 -> your php version (8.2.12) does not satisfy that requirement. - matthiasnoback/symfony-dependency-injection-test 4.2.1 requires symfony/config ^3.4 || ^4.4 || ^5.0 -> found symfony/config[v3.4.0-BETA1, ..., 3.4.x-dev, v4.4.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev] but these were not loaded, likely because it conflicts with another require. - matthiasnoback/symfony-dependency-injection-test[4.3.0, ..., v4.3.1] require symfony/config ^4.4 || ^5.3 || ^6.0 -> found symfony/config[v4.4.0-BETA1, ..., 4.4.x-dev, v5.3.0-BETA1, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev] but these were not loaded, likely because it conflicts with another require. - Root composer.json requires matthiasnoback/symfony-dependency-injection-test ^4.1 -> satisfiable by matthiasnoback/symfony-dependency-injection-test[4.1.0, ..., v4.3.1].