Not sure what was wrong with circle, "powercycled" to see if that fixed it.

I am still confused about why circle is failing.

I am still confused about why circle is failing.

You mean the circleCI pipeline? I think it fails in every pull request but don't know why. Here's what they said

Could not find a usable config.yml, you may have revoked the CircleCI OAuth app.
Please sign out of CircleCI and log back in with your VCS before triggering a new pipeline.

So it looks like some account configuration issue

Circle is running on other PRs, would you be willing to rebase your PR onto current main (or I can do it for you, but do not want to force-push to your branch with out permission)?

Circle is running on other PRs, would you be willing to rebase your PR onto current main (or I can do it for you, but do not want to force-push to your branch with out permission)?

rebased to latest commit but the problem seems consist

Circle is running on other PRs, would you be willing to rebase your PR onto current main (or I can do it for you, but do not want to force-push to your branch with out permission)?

BTW you are welcomed if you want to do more test and force push on this branch. That will be much more easier

If circle on #24622 passes I will merge this PR.

See https://gitter.im/matplotlib/matplotlib?at=638d07ac4abb3f4684a40439 for discussion debugging this.

Our theory is that there is something confused on the circleCI side with @hukaidong 's account which is the source of the problem.

CI passed on #24622 so I'm going to merge this PR and close mine.