Alright, it's getting pretty annoying. I've tried a handful of different scenarios to try to overcome the issue, but I simply cannot be damaged, nor can I inflict damage to anyone during a normal battle. Also, during a skirmish with animals, I cannot do them harm and they cannot harm me.
I cannot damage anyone!
The very first fight, right after the tutorial, works fine.
I'm at a loss as to what to do, because Dawn of Man seems totally playable, and play it I must!
Also, using a cheat (ctrl+alt+F4 and ctrl+F4) doesn't harm anyone, either. It shows the cheat doing 0 damage.