so i try to animate a fall person with physic and i the set up everything correctly like in all the tutorial vids and it did... nothing. so i thought it maybe the custom model sice that a common issuse, so i put a normal scout model and try it on him. didnt work, didnt run. so i turn off sfm download sfmphys off of github in case of an update reintalled it and try again. didnt work. so then i tryed a simpile model, the HL2 item crate. this model has been used for every physics prop from everyvideo it a go too for anyone using sfmphys. so i turn off and on sfm, put the rig on the crate model, selete how much time i run the sim to run ANDDDDDD.... NOTHING!! didnt ever work for the crate model everyone has use for years! so put up the scrpit write tap and console tap and when i run the sim rig. i get this error. no matter what model be it cloth_test, scould, create or other it siads the same error or whatever this python ♥♥♥♥ is and i dont know what to do. i look around and it seems im not the only one have thsi problem. PLZ HELP

here the error code or whatever this is

Traceback (most recent call last):
File "<string>", line 54, in <module>
File "b:\steamlibrary\steamapps\common\sourcefilmmaker\game\sdktools\python\2.7\win32\lib\site-packages\sfmphys\rigutils.py", line 67, in __init__
self.readFromGroup(group, time)
File "b:\steamlibrary\steamapps\common\sourcefilmmaker\game\sdktools\python\2.7\win32\lib\site-packages\sfmphys\rigutils.py", line 142, in readFromGroup
self.pos, self.quat = TransformToPosQuat(GetAbsTransformAtTime(self.handle, time))
File "b:\steamlibrary\steamapps\common\sourcefilmmaker\game\sdktools\python\2.7\win32\lib\site-packages\sfmphys\dagutils.py", line 40, in GetAbsTransformAtTime
partrans = GetAbsTransformAtTime(dag.GetParent(), time)
File "b:\steamlibrary\steamapps\common\sourcefilmmaker\game\sdktools\python\2.7\win32\lib\site-packages\sfmphys\dagutils.py", line 35, in GetAbsTransformAtTime
trans = GetTransformAtTime(dag, time)
File "b:\steamlibrary\steamapps\common\sourcefilmmaker\game\sdktools\python\2.7\win32\lib\site-packages\sfmphys\dagutils.py", line 62, in GetTransformAtTime
pos = GetValueAtTime(dag.FindTransformControl().GetPositionChannel(), time)
AttributeError: 'NoneType' object has no attribute 'GetPositionChannel'


and i ever found and look inside where this thing is tell me to go. idk what to do
and idk how to fix [ AttributeError: 'NoneType' object has no attribute 'GetPositionChannel' ]
the last thing i saw about this was in 2025 so it like a recent thing i guess.