i'm using Minecraft forge 1.21, idk what's causing this but when I click singleplayer, the game crashes with an error "The game crashed whilst rendering screen Error: java.lang.NullPointerException: Cannot invoke "net.minecraft.world.level.LevelSettings.getLifecycle()" because "this.settings" is null" at first I thought it's because of a mod I am using but even when I have no mods in the mod folder, it still crashes.