You don't open the samp-npc executable, you need to run the samp-server.exe one. This error happens when you either don't have the streamer.dll plugin or have not configured the server to use the streamer plugin like this:
What is this I don't even. Do you have a clue what you are talking about? If you try to run the samp-npc exe, nothing happens! This error happens when you dont have a plugin configured correctly.