(Brought my post from Reddit to see if you guys can help me too.)
So I made a modded world with some mods I found that liked and play a little rp world and build by myself. So then one night my game froze and then couldn't go back in, it keep shutting down internal servers at loading terrain, I then the other day i was able to get back into the world by messing with the installation files. So now i am here because after installing some new mods I couldn't log back into the world again! It either shutting down internal servers again, or it keeps crashing at Loading Terrain its really annoy and google is not helping that good. I am using Forge 1.12.2 18.104.22.16847.