There's definitely something wrong with my installation of NWN, since, as written in the title, the game crashes when a PVP fight starts in multiplayer (I wanted to test something for my module in PVP, so I arranged this). I wanted to check if it's because of a game client, so I did the same on dedicated server. It was even worse, because the server crashed as soon as I tried to log in as a player.
I tried using an original version of a game's exe (instead of NWNCX, which I normally use), but the problem persisted.
Then I wanted to check if maybe my override is to blame for some reason, so I tried it with an empty override folder, still the same thing.
I'm positive that it's a recent problem, since just a week or two ago I was hosting a dedicated server and logging in with no problems.
Any ideas what might be going on?