composer require drupal/core-recommended:11.0.0-beta1@beta drupal/core-composer-scaffold:11.0.0-beta1@beta drupal/core-proj

[romulasry]

Your requirements could not be resolved to an installable set of packages.

Problem 1
- Root composer.json requires drupal/core-recommended 11.0.0-beta1@beta -> satisfiable by drupal/core-recommended[11.0.0-beta1].
- drupal/core-recommended 11.0.0-beta1 requires sebastian/diff ~5.1.1 -> found sebastian/diff[5.1.1, 5.1.x-dev] but these were not loaded, likely because it conflicts with another require.

Installation failed, reverting ./composer.json and ./composer.lock to their original content.

How do I fix that

[romulasry]

What else does it conflict with, anyone know?