Ubuntu minecraft server won't run with IC2

  • I've set up a minecraft server on my ubuntu VPS using https://www.linuxnorth.org/minecraft/modded_linux.html as my guide. The forge version I used is 1.12.2- When I run it without any mode, everything works fine. When I add industrialcraft-2-2.8.221-ex112.jar (from http://jenkins.ic2.player.to/job/IC2_112/221/) to mods folder, I get "Connection refused" error while trying to connect to the server in Minecraft itself.

    Here's the console output: