Testing on Arch Linux 6.0.2
Starter jar file is corrupted, coming in at a whopping 0 bytes

its not 0 bytes on my side, tested yesterday. sounds like it failed to download it

Tried on both my local PC and a separate server, neither worked
Download link is probably just down

I tested immediately after posting and it worked for me again. I would suggest you download the files on your local machine and copy them up to the server since the server is having a problem downloading files

Neither my PC or the server worked, but I'll try it in the morning

If anyone else is having this issue, open the startserver.sh or startserver.bat file and look for the server starter jar link it should look something like https://github.com/TeamAOF/ServerStarter/releases/download/v2.4.0/serverstarter-2.4.0.jar download the jar file and place it in the server directory and run the script again. It will now install all the mods and set everything up.