is this :
Traceback (most recent call last): File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\scripts\modules\addon_utils.py", line 376, in enable mod = importlib.import_module(module_name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\python\Lib\importlib_init_.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "", line 1204, in _gcd_import File "", line 1176, in _find_and_load File "", line 1147, in _find_and_load_unlocked File "", line 690, in _load_unlocked File "", line 940, in exec_module File "", line 241, in call_with_frames_removed File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\scripts\addons\mixamo_rig_init.py", line 47, in from . import mixamo_rig File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\scripts\addons\mixamo_rig\mixamo_rig.py", line 6, in from .utils import * File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\scripts\addons\mixamo_rig\utils.py", line 8, in from .lib.bones_pose import * File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\scripts\addons\mixamo_rig\lib\bones_pose.py", line 3, in from .version import * File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\scripts\addons\mixamo_rig\lib\version.py", line 3, in class ARP_blender_version: File "C:\Program Files\Blender Foundation\Blender 4.1\4.1\scripts\addons\mixamo_rig\lib\version.py", line 7, in ARP_blender_version _char = bpy.app.version_char ^^^^^^^^^^^^^^^^^^^^ AttributeError: 'bpy.app' object has no attribute 'version_char'
HELP!!