After a loooooooong time with the loading animation I press escape and now I can move the head around but everything is black. Trying to use /ftb home doesn't work. After a while the game crashes.

http://pastebin.com/GgN5RVZs

Related to the other thread, tried removing Chisel and got it to work. Unfortunately I've been using Chisel when building my world so Cavern will have to wait until that issue is solved. Looks like a very interesting mod though.