We configured a php-cs-fixer like the example in the readme suggest, using a Personal Access Token so it should work in forks.

It does not work though, see the build error in https://github.com/redaxo/redaxo/pull/3092/checks?check_run_id=373678935

Is there anything obvious wrong?
Is this not a supported feature?

The workflow is configured in https://github.com/redaxo/redaxo/blob/master/.github/workflows/csfix.yml