Anyone knows solution for Neverwinter Nights toolset error?

The video of what happens:

Hello. Sorry if NWN discussion is not allowed here, but I've looked other posts and other people talk about NWN and I couldn't get any answers from other NWN communities, so here we go.

I tried to make a doorway that connects a house inside and outside in NWN EE toolset.

However, error occurs when I do that. How do I fix this?

I've tried several times but it's all same. I even tried connect the door not both ways, but only one way

or I tried very tiny map, and I didn't run any other program beside NWN toolset but error occurs and it turns off.

Anyone knows how to fix this?

Thank you.

 

Actually, it's solved: I just had to add tags, not using 'Setup Area Transition'