Repo not being recognized as an action?

I’ve created a repo and want to publish it to the marketplace (or at least use it somewhere else).

It’s got an action.yaml, a README and an (copied from elsewhere because nothing else appears to work).

But it still won’t let me publish. What am I missing?

@aronchick ,

I have helped you report this issue to the appropriate engineering team for further investigation and evaluation. If they have any progress, I will notify you in time, and sometimes the appropriate engineers may directly reply you here.