Unable to export Skyrim SE .nif in Blender 3.6

[nogsmcgogs]

@niftools/blender-niftools-addon-reviewer -

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Fill out the template below to the best of your ability, including .blend files, nifs, logs; help us to help you.

Issue Overview

When attempting to export a project as an .nif, the export fails and Blender displays this error message:

Python: Traceback (most recent call last):
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\operators\nif_export_op.py", line 148, in execute
    return NifExport(self, context).execute()
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\nif_export.py", line 135, in execute
    root_block = self.objecthelper.export_root_node(self.root_objects, filebase)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\object\__init__.py", line 104, in export_root_node
    self.export_node(b_obj, None, n_node_type=b_obj.niftools.nodetype)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\object\__init__.py", line 216, in export_node
    self.export_node(b_child, node)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\object\__init__.py", line 169, in export_node
    mesh = self.mesh_helper.export_tri_shapes(b_obj, n_parent, self.n_root, b_obj.name)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\geometry\mesh\__init__.py", line 312, in export_tri_shapes
    n_geom.add_bone(n_node, vert_weights)
AttributeError: 'BSTriShape' object has no attribute 'add_bone'

Version Information

Blender Niftools Addon Version Info

0.1.1 (latest release)

Blender Version Info

Version 3.6.8.0. Attempted in 4.0 as well, but the .nif would not even import correctly let alone export.

Platform information

Microsoft Windows 10 Home

Context

Imported an .nif I downloaded from a Skyrim SE Nexus mod. Attempted to import into Blender 4.0 with the latest addon release, mesh would not import correctly. Switched to Blender 3.6.8.0 after Googling issue, this time .nif imported correctly. Made minor adjustments to the mesh and attempted export, but the export failed and I received the aforementioned errors. Attempted again, this time importing the .nif and immediately attempting an export again without modification, and the same error occurred.

Steps to Reproduce

1. Import .nif
2. Attempt to export .nif

Expected Result

A successful export.

Actual Result

Export fails and Blender shows above error.

Possible Fix

Really not sure. I attempted to Google for how to resolve this error, and the closest thing I could find was this issue, though as far as I can tell it is not the same issue as that fix did not work for me.

Screenshot

Logs and Files

Info Bar Output

Python: Traceback (most recent call last):
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\operators\nif_export_op.py", line 148, in execute
    return NifExport(self, context).execute()
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\nif_export.py", line 135, in execute
    root_block = self.objecthelper.export_root_node(self.root_objects, filebase)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\object\__init__.py", line 104, in export_root_node
    self.export_node(b_obj, None, n_node_type=b_obj.niftools.nodetype)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\object\__init__.py", line 216, in export_node
    self.export_node(b_child, node)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\object\__init__.py", line 169, in export_node
    mesh = self.mesh_helper.export_tri_shapes(b_obj, n_parent, self.n_root, b_obj.name)
  File "C:\Users\dayn\AppData\Roaming\Blender Foundation\Blender\3.6\scripts\addons\io_scene_niftools\modules\nif_export\geometry\mesh\__init__.py", line 312, in export_tri_shapes
    n_geom.add_bone(n_node, vert_weights)
AttributeError: 'BSTriShape' object has no attribute 'add_bone'

Console Output

[Set the logging level to 'Debug' and attach the output of the console. Enable via Window -> Toggle Console]
I genuinely tried for like an hour to do this, but couldn't figure it out. Once I launched Blender via the command prompt, I could no longer type in the console. Not sure why, couldn't find a fix.

Blend File

https://drive.google.com/file/d/1pZmtvKH9JBWTFc5OreqmhDLJ-7F-WF6S/view?usp=sharing

Nif File

https://drive.google.com/file/d/1w6OVl58Nkzr7ibteJk_0NSIif5BTxN_F/view?usp=sharing

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