Issue description: When logging in the player crashes the server

What happens: When logging in the player crashes the server

What you expected to happen: To not crash

Steps to reproduce:

1. I'm not sure

...

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

• Minecraft: 1.10.2
• Forge: 2119
• Refined Storage: 1.2.1

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

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

http://pastebin.com/5F8yCwC1