Describe the crash

To Reproduce
Steps to reproduce the behavior:
-Install only ice and fire rotn version and library to see that there is the problem.
-On creative go to ice and fire blocks tab and try to see the pixies house.
-Complete! Your game is crashed.

Crash Log

Info (please complete the following information):

• Modpack Version:
  • 2.77.5
  • 3.0 BETA 5
  • Other: a single mod issue
• Server or Singleplayer:
  • Server
  • Singleplayer
• Version the world was created on:
  • 2.77.5
  • 3.0 BETA 5
  • Other: a single mod issue

Additional context

Can you resubmit this to https://github.com/Rebirth-of-the-Night/Ice_and_Fire/issues? Thanks

Done! :D