NWN2 on a LAN Server - Stopping Server Crash?

So I purchased some copies of NWN2 for my 3 kids from GOG.com and we all have copies. I tried hosting a vanilla LAN game two days ago with them, but the server would automatically close down without any warning after about 10 to 20 mins. Same thing after multiple restarts of the game.

Is there a trick to getting the server to not close down? We didn’t lose connectivity over the LAN at all, I don’t think. It’s just that my server game mysteriously shuts down. I don’t know why.

Suggestions? This is with the vanilla NWN2 Complete from GOG.com on Windows 10 Home OS. I downloaded and installed the game files manually (didn’t use their downloader).

Also, when we did get it to work for about 20 minutes, we tried running the main campaign. Whenever someone would enter a new area, we’d all automatically teleport there. NWN1 never did that. Is there a fix for that as well?