The Curse Forge website is returning a 404 error when I attempt to load the mod's page there.
Doing a Google search for the mod's other pages, Modrinth also returned a 404.

It was temporarily removed because of this #43

The Modrinth page is still up, the link was just changed from https://modrinth.com/mod/ad-astra-fabric to https://modrinth.com/mod/ad-astra