Forge: forge-1.12.2-14.23.5.2768-universal
Sponge: spongeforge-1.12.2-2768-7.1.4
Farseek: Farseek-1.12-2.3.1
Streams: Streams-1.12-0.4.4

Console stack trace: https://hastebin.com/jusegitenu.rb
Error.log: https://hastebin.com/oxupapafaf.bash

I know it's streams because the server crashes with streams and farseek but does not crash without them.
Crashes on worldgen

Sorry I couldn't get back to you earlier on this one, it seems the hastebin logs have expired since so I cannot view them. However, the newly-released Farseek 2.3.2 has several compatibility improvements with SpongeForge so it might resolve your issue; please give it a try and let me know.