I'm trying import the character and animation from mixamo in blender. Default pose my character is A-pose, but Mixamo's animation is T-pose. Hand's bone is error when run animation. Here's what happen when i try to run animation.
I had this problem and managed to fix it by doing this:
First you need to scale your model correctly to the size you want in Blender. Then while in object mode press A to select all and then press Ctrl+A and apply scale, rotation and location. After that, export your model as an .obj.
Import it into Mixamo, animate it and then export it as a .dae.
Now, import the .dae into blender. Re-scale the model to what you had it as before and then it should work.