No module named 'stlib3' #101

As in the title, once I try to launch the tripod-tutorial.py I get the following message:

[ERROR] [SofaPython3::SceneLoader] Unable to completely load the scene from file 'C:\Users*******\Desktop\aaasofa\tripod-tuto.py'.
Python exception:
ModuleNotFoundError: No module named 'stlib3'

At:
C:\Users******\Desktop\aaasofa\tripod-tuto.py(1):
(219): _call_with_frames_removed
(848): exec_module
(6):

What should I do? I checked and the stlib3 folder is where it should be (/plugins/STLIB/lib/python3/site-packages/)