No, they're pointing out that the server this post is about got deleted.
The admins got annoyed by Fluxer's stability issues and announced they'd be developing their own activitypub platform instead to compete with fluxer, leading to them neglecting the Fluxer server this post is about.
Then, both the fediverse server and the one about their alternative got deleted. At least one of the admins also deleted their Mastodon.