MilesGaming

I am making a minecraft modpack on twitch. I keep getting this error: The game crashed whilst exception generating new chunkError: java.lang.VerifyError: Operand stack overflow. I don't know how to fix it. I have deleted various mods that change world generation but it still does not work. I even added optifine but that didn't work either. Am I doing something wrong? Full crash report: https://pastebin.com/fQKSMEyy