Whenever I try to generate a world with Minecraft Forge (and 37 other mods! Phew.), I get the following error message after a while:
I apologise for not being able to get the error message Minecraft itself gives me (MultiMC really hates error messages!).
EDIT: This is the error message the MultiMC console gives me:
Apologies if it's just repeating what has been said before. I just want to have all the data I can manage.