I found a strange world gen glitch that's super annoying. A biome that looks like extreme hills is actually ocean or deep ocean, yet it generates like a flat extreme hills (complete with lakes). It causes strange chunk glitches where one chunk will be thrust above the rest, creating a completely flat wall of stone and ores, and makes it so many mods I have don't work, specifically the ones that generate structures. It completely ruins the exploration experience. I would provide a screenshot if I could but for some reason when I click choose files and select the screenshot it says upload failed
Now a new development: I can't even run 1.7.10 anymore. I can't run forge at all. I need this fixed, and I want to play 1.12.2 but can't. Please fix this (at least for 1.12.2)
I'm trying to run forge 1.8, and can't. Below is the error message. It doesn't give me a crash report either. I've tried 1.8, 1.8.8, 1.8.9, and every version of each of those and I get the same error message. I've tried switching my java version, running jarfix, even deleting my .Minecraft folder and opening the launcher. Please help. I have ran the vanilla versions of each version I've tried.