Maybe screenshot will be better as explanation :)
When I click Continue:

https://image.ibb.co/kxo62o/bonfire_error.png

First I thought it was a joke... I have never heard of such a message, can u run normal WoTn? Sounds like something that has NOT to do with the Bonfire Mod.

Yes, I can run WotN without problem on Windows 10.

About the "not allowed to run this game" message
 

I remember something about not having the original game from Steam, would show this message.. a cracked version should not work with Bonfire or Hylfire mod.

Do you own an original copy? and from Steam?

Original from Steam.

Did you rename original WoTN before installing Bonfire? Most people that have problems forget that and overwrite the original... It's best to delete or rename original WoTN.

I even tried downloading Bonfire again, just to check if it was hacked... no problems on my machine...

About BONFIRE 2:

Terroin has been working on this for some time, but we have encountered a problem we cannot fix. Therefore it is back to scratch to find a new combat system. We tried to make creatures start off with ZERO talents, but when they get experienced in fight they would get random ones that fit that creature, for instance a CAVE SPIDER could get Web, Mass Web, Haste, Run and rarely Summon Spideroffsprings.

We don't know if there will be a Bonfire 2. We will see. I'm working on a new Crossworld campaign instead, I've finished map 6. I also found out how to implement bosses, so they will add to the gameplay experience. It's a NEW campaign, it means new maps (or a few Bonfire maps redone), new quests and story. I probably only need 2 maps more. Check out:
http://forum.1cpublishing.eu/showthread.php?t=230150

Good Old Games is an alternative game distribution service, and it doesn't use a Steam-style approach to the game launching.

I, too, have not been able to get Bonfire working on a GOG install of Warriors of the North. I'm pretty sure Bonfire's current coding is only compatible with a Steam installation in specific. Which is a bit frustrating, because Bonfire sounds pretty cool.

THE TRENT WAR

I've finished a completely new campaign for the Crossworld environment. New quests, story etc. Testing fase now. Checkout

http://forum.1cpublishing.eu/showthread.php?t=230196

Erkihlmarl who also tested Bonfire, is testing it now. Need one more tester. Mail uffe@uffekunst.dk

Pretty big let-down that it does not work with the GOG version. (Moves downloaded mod to trash can). Bizarre that this guy does not even know what GOG is (unless he has been hiding under a rock for the last 10 years or so).