When a new Confluence milestone version is released, the version that can be downloaded is one higher than the version you have in the repository.
Last published version here is 9.4.0-m67.
Last published version in the repository here is 9.4.0-m66.
Is there a bug somewhere or is it by design? It was the same with all the previous milestones.
Thanks a lot for your report. We have double checked from our release pipeline. It turns out one of our pipeline has used the wrong version variable, that led to the reason why it has not been promoted.
I had implemented a fix and rolled out it. Next release will be good.