Issue description:

Server and client crash

What happens:

on loading

What you expected to happen:

Steps to reproduce:

1.Start my modpack server
2.Start my modpack client
3. :P
...

Version (make sure you are on the latest version before reporting): build 183 of version 1.6

• Minecraft:1.12.2
• Forge: 14.23.4.2729
• Refined Storage:1.6 build 183

Does this issue occur on a server? [yes/no]
both

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

[pastebin/gist/etc link here]
https://gist.github.com/Helimyne/e226a4b6e39269d375e6ecb2459e6afd