The Mod will be loaded with MC version 11.1.2, but after connecting to a multiplayer-server or loading a world or creating a new world in singleplayer the game will close without any crasherror.

If the mod is not loaded Minecraft start the World fine.

The latest version of the mod is for Minecraft 1.11, not 11.1.2.
A new version for 11.1.2 will come out soon