Are Mixamo animations compatible with Space Robot Kyle?

I am currently making a multiplayer first-person-shooter game with Unity, and I recently found this software called “Mixamo”.
I downloaded a running animation for my character from mixamo, but It does not work with my character (Space Robot Kyle)- they just don’t move. It plays the animation fine, but I am not sure if Mixamo animations are compatible with Space Robot Kyle. Am I missing something, or how do I get Mixamo animations to work with Space Robot Kyle?

They will work on any Humanoid character.

Is the Robot Kyle Mesh marked as Humanoid? Are the downloaded animations marked as humanoid? Are you using the Animator Avatar for the Mesh and NOT the animation?

I made a video tutorial on that exact topic here FREE Characters and FREE Animations for your GAMES! - Code Monkey