an open a PR or draft PR to fix it.
b.) The issue description does not propose a fix. In this case, you can ask what a proposed fix could look like and someone from the Diffusers team should answer shortly. If you have a good idea of how to fix it, feel free to directly open a PR.
c.) There is already an open PR to fix the issue, but the issue hasn’t been closed yet. If the PR has gone stale, you can simply open a new PR and link to the stale P