Version:
minecolonies-1.12.2-0.10.39-ALPHA-universal.jar

I was playing the game and went through 2 in game days. The first crash occurred while I was crafting something. I then reloaded the world and went on playing for 2 more minutes and the game crashed again. Since then, I'm not able to open the world again, it crashes every time before loading the world.

crash-2018-11-10_11.59.59-server.txt

update your forge version, its missing the function used

Thanks.