I cant even join my single player world and im devastated :// went to place a leather chestplate, a sword and then some bread but crashed as I clicked the sword after the armor. The kangaroo was sitting down as I did this.

The game crashed whilst rendering entity in world
Error: java.lang.NoSuchMethodError: 'net.minecraft.client.model.HumanoidModel net.minecraftforge.client.ForgeHooksClient.getArmorModel(net.minecraft.world.entity.LivingEntity, net.minecraft.world.item.ItemStack, net.minecraft.world.entity.EquipmentSlot, net.minecraft.client.model.HumanoidModel)'
Exit Code: -1