Years ago I saw a huge fight over the "afraid of dark" issue with basenjis. No one won.
Dark isn't safe for most animals though, Africa or anywhere. Personally, I have only had 3, none care. In fact have never had a dog afraid of the dark except our rescue poodle who was geriatric and forming cataracts. My daughter, however, who is not from Africa, used to be afraid of the dark. I suspect fear of the dark is innate in many species, so I don't dismiss it. I know this same debate has gone on with Chows also.
I will tell you this, just because it scarred me and I want to share.
Many years ago in a human anatomy and physiology class, the teacher told us to think of the times we were out in the dark and THOUGHT we saw something out the corner of our eyes but when we looked directly, nothing was there. He said, guess what– at night, you actually CAN see some things better out the corner of your eye-- so don't bet it wasn't there.