what do you mean with integrated/onboard graphics? Im not that much of a tech person
Some CPUs/Processors have 'graphics capabilities' integrated in to them, fine for stuff that's not graphically intense like working on documents or browsing the web etc, not so good for 3D games (nor some 2D games for that matter).
The game looked to be trying to use the one in your intel CPU to run the game, which just wont meet the minimum spec. Since you solved it, it's likely the game now sees your dedicated graphics card.