I've been trying to set up a server with this modpack (this exact file, but without SoundFilter, as it was client-side and causing errors server-side). I am running it on Arch Linux with Java 8. When I attempt to connect, though, Minecraft says "Fatally missing blocks and items" while the server gives me this output:
I also tried running the server with the exact same files (except the ip in server.properties) on Windows and I could connect and play with no issues. I would really appreciate if someone could steer me in the right direction, or at least help me figure out which "blocks and items" it's missing.