Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires nyholm/symfony-bundle-test 1.x-dev -> satisfiable by nyholm/symfony-bundle-test[1.x-dev]. - nyholm/symfony-bundle-test 1.x-dev requires symfony/dependency-injection ^4.3 || ^5.0 || ^6.0 -> found symfony/dependency-injection[v4.3.0, ..., v4.4.49, v5.0.0, ..., v5.4.34, v6.0.0, ..., v6.4.2] but these were not loaded, likely because it conflicts with another require. Problem 2 - matthiasnoback/symfony-dependency-injection-test v3.1.0 requires php ^7.1 -> your php version (8.3.1) does not satisfy that requirement. - matthiasnoback/symfony-dependency-injection-test[4.0.0, ..., 4.2.0] require php ^7.2 -> your php version (8.3.1) does not satisfy that requirement. - matthiasnoback/symfony-dependency-injection-test 4.2.1 requires symfony/dependency-injection ^3.4 || ^4.4 || ^5.0 -> found symfony/dependency-injection[v3.4.0, ..., v3.4.47, v4.4.0, ..., v4.4.49, v5.0.0, ..., v5.4.34] 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/dependency-injection ^4.4 || ^5.3 || ^6.0 -> found symfony/dependency-injection[v4.4.0, ..., v4.4.49, v5.3.0, ..., v5.4.34, v6.0.0, ..., v6.4.2] but these were not loaded, likely because it conflicts with another require. - Root composer.json requires matthiasnoback/symfony-dependency-injection-test ^3.1|^4.0 -> satisfiable by matthiasnoback/symfony-dependency-injection-test[v3.1.0, 4.0.0, ..., v4.3.1].