I'm getting the same thing on 9.95.1.
It seems like it's trying to reach out to:
which doesn't exist yet.
There is a 9.80.8 though. Don't suppose anyone knows an easy way to have it point at that just to test out?
Edit: Just in case anybody is stuck and slow like me, you can go to the individual packages, download and install them from this link:
I just needed jacket, medusa and radarr so I installed them independently along with the dependencies and they seem ok so far.