ModuleNotFoundError: No module named 'encryption'

Hello,
I want to use plaxis with python scripting and i have an error with the module plxscripting :
I use Spyder as IDE and the instruction is :
from plxscripting.easy import *
and i get the error :
File "C:\ProgramData\Bentley\Geotechnical\PLAXIS Python Distribution\01.00\python\Lib\site-packages\plxscripting\connection.py", line 32, in
import encryption
ModuleNotFoundError: No module named 'encryption'

I checked site packages and the module encryption exist in the folder so i don't know what the problem is. Can you help ?
Thank you