Issue description:

Server crashes on startup with Refined Storage v1.1 installed. I noticed this with other mods installed at first, and then tested it with the mod alone and the crash still occurred.
I am using the latest version of MCMultipart, Forge and Refined Storage.

What happens:

Server crashes during startup.

What you expected to happen:

Server to start.

Steps to reproduce:

1. Start server with Refined Storage and MCMultipart installed.

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

• Minecraft: 1.10.2
• Forge: 12.18.1.2094
• Refined Storage: 1.1

Does this issue occur on a server? [yes]

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

http://pastebin.com/F2zKm5cZ

I'm Having the same issue.
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/gui/GuiScreen
at refinedstorage.proxy.CommonProxy.preInit(CommonProxy.java:73)
at refinedstorage.RefinedStorage.preInit(RefinedStorage.java:55)

I"m getting the same issue as well, running a dedicated server. Issue does not occur in the client. I believe the mod is trying call on a class only present in the client, not the dedicated server.