“Color tint” in Tone Mapping controls is set to black, this will cause the image to always come out completely black
This message is caused by having “Color tint” value in Render Setup > Camera> Edit Tone Mapping > Tint set to complete black (RGB 0,0,0).
At such circumstances, your scene will always render black regardless of scene setup or, as the color tint setting multiplies the whole image by the given color (any value multiplied by 0 = 0).
“Color tint” in tone mapping controls is set to black.
Set “Color tint” value to some reasonable, bright color.
See: Corona renders black screen!