If you recruit a group of adventurers, it only tells you how much one of them costs and you can only recruit him, if you have enough money. But as soon as you accept, you pay both adventurers and might even get a negative numbers for your money.
I already posted this bug in Beta, but I still get it with 1.08:
https://forums.elementalgame.com/385686
I also posted some suggestions how to solve it there.
