Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires symfony/proxy-manager-bridge 7.0.*, found symfony/proxy-manager-bridge[v2.3.0, ..., 2.8.x-dev, v3.0.0-BETA1, ..., 3.4.x-dev, v4.0.0-BETA1, ..., 4.4.x-dev, v5.0.0-BETA1, ..., 5.4.x-dev, v6.0.0-BETA1, ..., 6.4.x-dev] but it does not match the constraint. Problem 2 - behat/behat[v3.6.1, ..., v3.7.0] require symfony/dependency-injection ^2.7.51 || ^3.0 || ^4.0 || ^5.0 -> found symfony/dependency-injection[v2.7.51, ..., v2.8.52, v3.0.0, ..., v3.4.47, v4.0.0, ..., v4.4.49, v5.0.0, ..., v5.4.32] but it conflicts with your root composer.json require (7.0.*). - behat/behat[v3.8.0, ..., v3.8.1] require symfony/dependency-injection ^4.4 || ^5.0 -> found symfony/dependency-injection[v4.4.0, ..., v4.4.49, v5.0.0, ..., v5.4.32] but it conflicts with your root composer.json require (7.0.*). - behat/behat[v3.9.0, ..., v3.13.0] require symfony/dependency-injection ^4.4 || ^5.0 || ^6.0 -> found symfony/dependency-injection[v4.4.0, ..., v4.4.49, v5.0.0, ..., v5.4.32, v6.0.0, ..., v6.4.0] but it conflicts with your root composer.json require (7.0.*). - Root composer.json requires behat/behat ^3.6.1 -> satisfiable by behat/behat[v3.6.1, ..., v3.13.0].