• Circa 2020 it was quoted as shutting down.
• Circa 2021 no notice of shutdown is on website
• Circa 2021 https://gethaven.app/ no longer functions

Abandoning open source projects with no clear message, so hot right now

• If it's dead and the original authors have no interest in maintaining or reviewing patches, mark the git repo as read-only and communicate that via the website.
• If the project is alive, communicate that and the intent of the developers.

The options above will encourage a fork if the original authors are no longer interested in the project.

tldr; don't leave a project in an "abandoned limbo" because nobody knows what the hell to do.