I had the same problem as you: weird error messages and a badly mangled armature after running the 'Mixamo Rig' add-on. File '/Users/20262059/Library/Application Support/Blender/2.93/scripts/addons/Mixamo add-on for Blender/mixamo_rig.py', line 176, in execute it still had an error code this time with this error message.

I then tried again with a character from mixamo, this time with an animation. This is a character rigged on mixamo and then downloaded in default pose

Python: Traceback (most recent call last):įile '/Users/20262059/Library/Application Support/Blender/2.93/scripts/addons/Mixamo add-on for Blender/mixamo_rig.py', line 176, in executeįile '/Users/20262059/Library/Application Support/Blender/2.93/scripts/addons/Mixamo add-on for Blender/mixamo_rig.py', line 1902, in _make_rigįile '/Users/20262059/Library/Application Support/Blender/2.93/scripts/addons/Mixamo add-on for Blender/mixamo_rig.py', line 1122, in add_legĬns = c_foot_ik_pb.constraints.get(cns_name)ĪttributeError: 'NoneType' object has no attribute 'constraints' When I try to use the mixamo addon with my character it gives me this error message.

Blender mixamo addon