Reproduction steps:
1. Open the attached “ASDQWER” project
2. Select the “Assets/withSkinnedMesh.fbx” Asset
3. In the Inspector Window, select the “Rig” Button
4. In the “Rig” tab, select “Animation Type > Humanoid” and press the “Apply” Button

Expected result: The Avatar is successfully Auto-Mapped
Actual result: “Error(s) found while importing rig in this animation file. Open “Import Messages” foldout for more details” error is displayed in the Inspector Window and the Avatar is not fully Auto-Mapped

Reproducible with: 2021.3.29f1, 2022.3.6f1, 2023.1.7f1, 2023.2.0b3

Reproducible on: Intel macOS 13.5

Note: The situation is not reproducible when following the reproduction steps on the “withoutSkinnedMesh.fbx” Asset