You didn’t think that any race could be any class in Pantheon: Rise of the Fallen, did you? Of course not. No matter how dedicated a Gnome might be, the chart at Paladin School clearly states that you have to be at least this tall to be a Paladin, but also not taller than a human and also not whatever else every other race has other than Human and Dwarf. The point is that each race is rather limited (other than Humans) and you can see which classes are allowed for each race off of the official Facebook page.
It’s bad news if you’re an Ogre, since you only have four classes available to you (and one of them is Dire Lord, which is a normal lord placed in perilous circumstances, one may assume). On the other hand, Dark Myr get nearly as many options as Humans, so that’s something. Here’s hoping your desired race and class can be combined in the game!