Difficulties with importing an animation from Mixamo

[MartensCedric]

I am trying to import animations from Mixamo and encountering some difficulties.

These are the steps I undertook so far:

1. I uploaded a character to Mixamo and downloaded an animation using a skeleton with no finger joints. This comes in .fbx format.
2. I converted the .fbx to .bvh using Blender
3. I manually created a skeleton by writing its entire hierarchy in a char_cfg.yaml file based off the skeleton used in the .fbx
4. I adjusted the joint locations using the fix_annotations_tool to make it consistent with my input.
5. I added and adjusted a config/motion for my needs

I am now having quite some struggle with the retargetting.

Firstly, I assumed that mixamo_fff.yaml would automatically target my skeleton.

That is not the case,

Traceback (most recent call last):
  File "annotations_to_animation.py", line 59, in <module>
    annotations_to_animation(char_anno_dir, motion_cfg_fn, retarget_cfg_fn)
  File "annotations_to_animation.py", line 40, in annotations_to_animation
    animated_drawings.render.start(output_mvc_cfn_fn)
  File "/home/cedric/Programming/AnimatedDrawings/animated_drawings/render.py", line 21, in start
    scene = Scene(cfg.scene)
  File "/home/cedric/Programming/AnimatedDrawings/animated_drawings/model/scene.py", line 30, in __init__
    ad = AnimatedDrawing(*each)
  File "/home/cedric/Programming/AnimatedDrawings/animated_drawings/model/animated_drawing.py", line 247, in __init__
    self._modify_retargeting_cfg_for_character()
  File "/home/cedric/Programming/AnimatedDrawings/animated_drawings/model/animated_drawing.py", line 286, in _modify_retargeting_cfg_for_character
    assert False, msg
AssertionError: Could not find joint1 in runtime check: right_shoulder

Upon additional inspection of this file, I can see that this retargetting file has joints like left_hip and right_hip which are concepts that don't even exist in the skeleton I'm looking at.

Is this retargeting file supposed to work for mixamo? I don't see how I need to change this file to make it work. I've tried to remove the bones that I don't have without success.

Here's the bvh and the character file.
data.zip