Shooting with a light source behind the subject may cause the subject to be too dark. If possible, it is recommended that you either shoot from the same direction as the light source or improve the lighting of your surroundings.
The pictures were taken under poor light conditions. Always check the light sensor by gently pressing the shutter button halfway down. If the light sensor indicator lights up or blinks, there is insufficient light for a good picture. If possible, it is recommended that you either take the picture in a place with better lighting or improve the lighting of your surroundings.