Bug Character sinks into floor when playing animation.

I am having an issue with animation. Whenever I try to add an animation to a character, the character sinks into the floor in a weird pose. I have made multiple animations in blender, and downloaded multiple animations from mixamo. They all cause the same effect. I have watched hours of animation videos and read dozens of articles with no solution. I am new to animations, and don't have even the slightest clue as to why this is happening. Is there a setting that I have set up incorrectly? Attached is a screenshot of what my screen looks like. Any feedback would be great, thanks.

 

If you look at the source animation import settings, is there an avatar assigned to the animation files?

 

Hey, yeah I figured it out. I knew it would be a simple thing I was just overlooking. The animations that came from outside unity needed to be configured to humanoid and I had to check "create from this model" for the avatar definition. Thanks!

 

Just a note, it's better to share avatar definitions whenever possible, so you're not duplicating a bunch of redundant data.