Issue exporting from blender 3.4

Python: Traceback (most recent call last):
File "C:\Users\locti\AppData\Roaming\Blender Foundation\Blender\3.4\scripts\addons\io_scene_valvesource\export_smd.py", line 209, in execute
self.exportId(context, id)
File "C:\Users\locti\AppData\Roaming\Blender Foundation\Blender\3.4\scripts\addons\io_scene_valvesource\export_smd.py", line 551, in exportId
self.files_exported += write_func(id, bake_results, self.sanitiseFilename(export_name), path)
File "C:\Users\locti\AppData\Roaming\Blender Foundation\Blender\3.4\scripts\addons\io_scene_valvesource\export_smd.py", line 1100, in writeSMD
weights = self.getWeightmap(bake)
File "C:\Users\locti\AppData\Roaming\Blender Foundation\Blender\3.4\scripts\addons\io_scene_valvesource\export_smd.py", line 594, in getWeightmap
model_mat = amod_ob.matrix_world.inverted() @ ob.matrix_world
AttributeError: 'NoneType' object has no attribute 'matrix_world'

Unchecking my base model (the collection that includes the armature and the objects that make up the model) from Source Engine Exportable tab and exporting Scene exported the base model (how?) I havent checked if this exported file is corrupted or not