When I try to play multiplayer the game asks for a serial key. Does GOG version not come with one?

Should appear in your GOG library, where you downloaded the game from.

You are right. I forgot to look there lol

I don't know i have the same problem i think

Hello,
Here is a step by step method to find your serial key
1) Hover the mouse over your name on the top, click on games.
2) Scroll down to the game Mount and Blade: Warband, Click on it so the screen come up below it.
3) Find the name of the game in the area below. Find right below to the right the More button with the down chevron., Click on it.
4) Find the option named Serial Keys, click on it.
5) Copy your serial key!

When I try to play multiplayer the game asks for a serial key.

I found serial key its not in gog galaxy launcher I had to log in website click more serial keys there it is