Describe the bug
When booting up my modpack i go to create a new world and it crashes

To Reproduce
Steps to reproduce the behavior:
1.Load the modpack up
2.Go to create a new world
3. crashes
latest.log

Expected behavior
Its suppose to pull up the menu to create a new minecraft world.

ModPack
(wont let me upload the pack to github as it is 1642MB )

latest.log

I've got something similar going on here

Both crashes seems to be caused by broken datapacks.