Blender addon connection python error

SDK & Plugin
1

Blender 4.5 won’t show the UI, in blender 3.6 - blender 4.2 when hit “connect” it has this error:
RuntimeError: class REBOCAP_OT_connect, function execute: incompatible return value , : ‘no source found’ not found in (‘RUNNING_MODAL’, ‘CANCELLED’, ‘FINISHED’, ‘PASS_THROUGH’, ‘INTERFACE’)
Error: Python: RuntimeError: class REBOCAP_OT_connect, function execute: incompatible return value , : ‘no source found’ not found in (‘RUNNING_MODAL’, ‘CANCELLED’, ‘FINISHED’, ‘PASS_THROUGH’, ‘INTERFACE’)

2

OK I found the problem, it’s because my custom mixamo rig has a root bone