Blender add-on for mixamo error when create control rig

that model is not a true Mixamo rig because the hands have been tagged to stay on her sword but yes the tutorial clearly tells you to reupload your models to ensure you have a fresh Mixamo rig to work with... well done on getting your model fixed

Found workaround:

Upload the model (even though it was itself downloaded from maxiamo)  again to maxiamo for auto-rigging.

My guess is maxiamo has compatibility issue with its old model / animations. So after upload the model again, the issue is gone.

well as a coder I personally find control rigs offensive however I tested the model and rig at my end... following the tutorial Adobe posted with the rig

https://substance3d.adobe.com/plugins/mixamo-in-blender/

I have a Windows laptop with both

Blender 2.9.2 and Blender 3.1

https://download.blender.org/release/Blender2.92/

https://download.blender.org/release/Blender3.1/

the script works as expected on my end