Describe the crash

To Reproduce
Change to the shaderpack while in menu

Crash Log

crash-2020-10-03_18.32.13-client.txt

Info (please complete the following information):

• Modpack Version: RotN 3.0 Snapshot 4
• Server or Singleplayer: Singleplayer
• Version the world was created on: RotN 3.0 Snapshot 4

Additional context

Ought to be put on trello.