Their sample scene works for me with my custom imported character. Getting it to work with Ork is giving me trouble though. Reading around here on old posts & documentation I've tried the following...
1. Adding the scripts used for character control to the "Control Behaviours" section of Game Controls.
2. Changing the Player Controls -> Player Control Type to None
3. Going into Combatants -> General Settings -> Animations & Movement -> Change System Type to "Mecanim"
4. Setting a Mecanim Animation with Animation Type "Walk" using one of the provided animations as the "State Name"
The only animation that plays while using Ork in the project is the custom idle animation, seemingly no matter what settings I change. Walking around just glides the character around without animating them in any way. The custom characters prefab is used in place of the default Warrior character prefab.