Input bones do not match the skeleton of the Avatar

Unity Engine
1

I’m trying to setup a model with animations from mixamo, but this error keep popping :

I used the main fbx to generate a humanoid avatar, then imported fbx with animations and made them use that avatar.

I tried to check/uncheck “Optimize game objects”, but can’t see no change. The avatar seems totally valid, as I can move every muscle as expected is the config window…

How can I find the source of this problem ?

2

Have you attempted to enforce Tpose on all model and animations?

3

Yes, the base model was in A-pose and there was a red message inside the avatar config window.
So I set T-pose but I still got this “bones do not match the skeleton” error. Even without animation.