Error trying to run SITL in cygwin

I trying to run “…/Tools/autotest/ --map --console” as I followed in documentation and then this occur:

Administrator@DESKTOP-HDEFEB3 ~/ardupilot/ArduCopter
$ …/Tools/autotest/ --map --console
Traceback (most recent call last):
File “…/Tools/autotest/”, line 31, in
from pysim import util
File “/home/Administrator/ardupilot/Tools/autotest/pysim/”, line 20, in
import pexpect
ModuleNotFoundError: No module named ‘pexpect’

I don’t know what to do.
thanks for helping me.

@sirawichjet did you find the solution? i encounter the same problem