Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/behat-extension ^6 -> satisfiable by silverstripe/behat-extension[6.x-dev]. - silverstripe/behat-extension 6.x-dev requires silverstripe/framework ^5 -> found silverstripe/framework[5.0.0-alpha1, ..., 5.x-dev] but it conflicts with your root composer.json require (^6). Problem 2 - Root composer.json requires silverstripe/serve ^4 -> satisfiable by silverstripe/serve[4.x-dev]. - silverstripe/serve 4.x-dev requires silverstripe/framework ^5 -> found silverstripe/framework[5.0.0-alpha1, ..., 5.x-dev] but it conflicts with your root composer.json require (^6). Problem 3 - silverstripe/assets[2.1.0-beta1, ..., 2.x-dev] require silverstripe/framework ^5.1 -> found silverstripe/framework[5.1.0-beta1, ..., 5.x-dev] but it conflicts with your root composer.json require (^6). - silverstripe/framework 6.x-dev requires silverstripe/assets ^2.2 -> satisfiable by silverstripe/assets[2.x-dev]. - Root composer.json requires silverstripe/framework ^6 -> satisfiable by silverstripe/framework[6.x-dev].

Process completed with exit code 2.