Issue description:

Crash when trying to start server

What happens:

Server crashes during startup

What you expected to happen:

Server not crashing on startup

Steps to reproduce:

1. cd forgeserver; java -jar -Xms1024M -Xmx8192M forge.jar
2. "It's starting!!"
3. red wall of text, kicked back to terminal
   ...

Version (make sure you are on the latest version before reporting):

• Minecraft: 1.12.2
• Forge: 1.12.2-2838
• Refined Storage: 1.16.3

Does this issue occur on a server? YES

If a (crash)log is relevant for this issue, link it here:

https://pastebin.com/bVPUHUmf

Update to 1.6.14