No weight painting. This IS object mode

Tried that :/

https://youtu.be/qt1FT3x4H-0

Found out the problem. Apparently source tools were outdated, so I needed to uninstall and reinstall them. I thought just installing them was enough, but I need fo remove the original when installing the new

Python: Traceback (most recent call last):
File "C:\Users\FamixofPower\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\io_scene_valvesource\GUI.py", line 84, in draw
row.label(text=get_id("export_format") + ":")
File "C:\Users\FamixofPower\AppData\Roaming\Blender Foundation\Blender\2.93\scripts\addons\io_scene_valvesource\utils.py", line 302, in GetCustomPropName
def removeObject(obj):
TypeError: '_PropertyDeferred' object is not subscriptable

location: <unknown location>:-1

I opened a cosmetic, attempted to remove a small part of the model I don't want in my movie, and I got this error when trying to export as DMX and SMD. What did I do wrong, and how can I fix it?