Why the light cannot on?

@zullu that's a really bad idea for your device... that said, I just opened the craft and you have no lights, just beacon lights, which don't emit light.

@Pedro i set light to unlimited and my device is redmi note 9 chipset helio g85 ram 6 gb

You are using a very low end device, so the settings are set to allow no lights. You can tweak that, but it will likely make the game run really slow.