This was probably posted before but "search" only found weapon sets so I'll post it anyways. On my server (mini-game's owner doesn't matter), No players can hurt or kill another player. Events still damage, some attacks still knock the player back but you cannon harm a player with any weapon you hold. In mini-games, I've turned Weapon damage on and tried deleting some add-ons that may have caused the problem.
Why is it not working!?!