I'm using CurseBreaker to manage all my addons, up until recently I have not had any issues updating Auctionator directly from GitHub, but now I'm getting errors.

Did you remove the posibility of updating your addon using any other tool than CurseForge?

It isn't only Curseforge. Auctionator is available from both Curseforge and Wago. Wago has integrations with WoWUp and Cursebreaker.

That's a shame, limiting the addon to 2 addon client only :/