I'm a veteran Diablo/Hellfire playing it again thanks to amazing GOG - but! Since I got really used to use all available spell shortcuts (and there are only 4), not having one of them hurts.

My point is: F5, F6 and F7 works well as a shortcut for spells, but F8 doesn't work. After hovering on the spell icon and pressing F8 nothing happens.

Anyone else has this problem, or know how to solve it?

Thanks!

Are you sure your keyboard isn't just faulty?
Can you confirm that your F8 key works in any other program?

Yes, I confirm that my F8 works normally.

For anyone having the same problem - solved:

It somehow collided with Geforce's Overlay, I had the F8 key binded to one of the actions and thus Diablo didn't allow me to map it. After changing the keys in Geforce's overlay, it works how it should.

But strangely, I didn't have this problem in any other game so far.