Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires silverstripe/installer 6.x-dev.x-dev, found silverstripe/installer[dev-4.8-beta2, dev-post-2.4, 2.4.9, ..., 2.5.x-dev (alias of dev-post-2.4), 3.0.2.1, ..., 3.x-dev, 4.0.0-alpha1, ..., 4.x-dev, 5.0.0-alpha1, ..., 5.x-dev, 6.x-dev] but it does not match the constraint.

Process completed with exit code 2.

The following actions uses Node.js version which is deprecated and will be forced to run on node20: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab, shivammathur/setup-php@1a18b2267f80291a81ca1d33e7c851fe09e7dfc4, actions/cache@88522ab9f39a2ea568f7027eddc7d8d8bc9d59c8, actions/upload-artifact@0b7f8abb1508181956e8e162db84b466c27e18ce. For more info: https://github.blog/changelog/2024-03-07-github-actions-all-actions-will-run-on-node20-instead-of-node16-by-default/