WARNING:
Modified version of the FTB Presents Crackpack that uses fastcraft, says i should say it so i do.
This server was running, maybe not perfectly fine, but it was working to the point of constant use 24/7 by me and a few friends. I run this off my own machine. We cut down a lot of the mods we don't use but galacticraft has a special place in my heart.
I got your mod, downloaded the latest versions of galacticraft, got them all put away in the mod folders.

After starting the server it successfully starts galacticraft but then this happens.
http://pastebin.com/wNRQTqBZ

Caused by: java.lang.NoSuchFieldError: BlockIconSide < main error i believe.

crash-2016-07-24_03.23.26-server.txt

Any help appreciated even if i'm being a dumbass and didn't do something right.

So i narrowed down a non-issue... it's not world generation, i hid my old world and regenerated another one and got the same error...

However my client starts up just fine.