Animation is too high/in the air

Hi,
I downloaded an animation and character from Mixamo and now after importing the character and animation, when I click on “Play” and walk or crouch the “upper body” stays on the same z-axis position but the legs are moving into the air so that a distance is between the ground and the character’s feets.

Does anyone have an idea why this could happen and how to prevent it?

  • Thank you