Hey im new to source modding, trying to make a hand replacement for hl2 vr. i have the thing modeled but when i try and export it using the source tools it gives me this python error, any tips?

Python: Traceback (most recent call last):
File "C:\Users\_\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\io_scene_valvesource\export_smd.py", line 209, in execute
File "C:\Users\_\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\io_scene_valvesource\export_smd.py", line 551, in exportId
File "C:\Users\_\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\io_scene_valvesource\export_smd.py", line 1037, in writeSMD
File "C:\Users\_\AppData\Roaming\Blender Foundation\Blender\3.3\scripts\addons\io_scene_valvesource\utils.py", line 312, in animationLength
AttributeError: 'NoneType' object has no attribute 'action'