Hi. The Sun is a directional light, meaning that there's no reason to put it 9km away. Only thing happening is Max screwing up because of the long distance. The physically correct size of the Sun is 1, but numbers as 2, 3 or 4 are often used to make the shadows softer. 32 is way out of range IMHO. Physical correct intensity is 1 (clear sky).
Unless you're working with a very large city model (several km2) I would suggest a Sun distance around 50 - 100m, and for soft shadows I would set the Sun size to 4 and the intensity to 1 or lower. The Corona Sky map I would leave at default settings.
Hope it helps
Edit: not as fast as Juraj, but same message :)