Problem importing a blender animation

Hello everyone, :slight_smile:
First of all I apologize if my question concern a newbish mistake because I’m new to UE4 and animation in general. I didn’t found a similar topic on the internet.
I’ve made a simple character in blender looking like this :

16315-blender.png

I animated it to walk and it worked just fine.

Then I exported it in an .fbx file and imported it in UE4. But in UE 4 my animation is looking like this :

You can see that the right knee is out of shape and it is the same for the left one as the animation is going on.

Do you have any idea about how does this happened ? Also I made a simplier animation (4 bones in a line moving) to test the import of animation and I have the same problem of deformed result in UE4.
Did I forgot some work that I should do in the engine to make my animation work correctly ?

Tahnks for your answers :slight_smile: and sorry if I have a bad english, I’m not a native speaker

I managed to fix my problem by changing some settings in blender and UE4 (use TA0s reference pose)