How to bring custom 3D model rig into Xcode for ARBodyAnchor?

I am trying to use a custom model for ARBodyAnchor but when I run the program provided by Apple here:

https://developer.apple.com/documentation/arkit/content_anchors/capturing_body_motion_in_3d

I get the following error: "BodyDetection No skeleton found for entity"

I can't tell what the difference is between the way Apple rigged their skeleton and the way I rigged mine.

Here is my Maya model with the t-shirt object rigged to the skeleton

Have you already checked out the following articles? They might contain useful information for creating your custom model:

How to bring custom 3D model rig into Xcode for ARBodyAnchor?
 
 
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