That's because it was never maintained and never worked properly. I tried to use it, but it would only work like 1-4 times, lol. That's why nobody used it. They ran a top 20 witness and everything, but would never address any issues with the app that got them that spot. I begged and pleaded with them for years to actually fix things, but nope, never.
So I am currently building a set of tools to replace it. I currently have separate plugins, but will try to integrate them all into one big one eventually. Currently have an account creation/login feature and HBD payment plugin that all work with Hive Keychain that work great. Next is a posting plugin.