So I just returned to Minecraft after a long hiatus and I tried to create a world but there was an issue with connetion lost fatal error in single player. I uninstalled mods and reinstalled them and the same thing happened. I messed around with the memory thinking it would help but it did not. I even uninstalled and reinstalled Minecraft but it did the same thing after i installed the mods. So I currently have no mods in and am waiting for help before I work on it again. Please help.