MY NIKON D3000 Said 'Sub is too dark?

Please guide me, why my nikon d3000 said "sub is too dark" how to remove this? What happen to my camera? Is this normal? Waiting for you ans and help.

I have the same camera, it just means it is too dark where ever you are trying to take the picture.turn on the flash, or turn on a light. Or take the lens cap off.haha. Hope i helped!

The instructions that came with your camera explains this in detail. Read them.

Yes, simply put, you need more light.

Yas, you need to get some more light bro! Put the camera on auto flash and it will pop up the flash when it takes a picture

Subject is too dark? Go to the light!