Blender 3.5

Happens when exporting animation with 165 bones as dmx. Happens after baking animation from Rigify rig to deform rig, but still happens after exporting a blank 1 keyframe animation for idle.

Reading through the crash text generated it's all just a bunch of stuff I can't make any sense of other than the bottom being

# Python backtrace
File "C:\Users\StupidWaluigi\AppData\Roaming\Blender Foundation\Blender\3.5\scripts\addons\io_scene_valvesource\__init__.py", line 59 in item
File "C:\Users\StupidWaluigi\AppData\Roaming\Blender Foundation\Blender\3.5\scripts\addons\io_scene_valvesource\export_smd.py", line 213 in execute

referencing these lines. Has no issue with the armature when an animation is exported from it before Rigify was put on top of it. But then after using rigify and ripping the deform bones back, it crashes.

I am trying to apply a bodygroup onto demoman which is for his entire body. So this obviously works in gmod because the bones have the same names but why is this feature not in blender or how can I get around it